#647EF3
Closest named color: Cornflower (#6A79F7). oklch(63.2% 0.177 271.1), rgb(100, 126, 243).
Aa
Black text reads best on this color (5.82:1).
About this color
#647EF3 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.177 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.015 away. Black text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.82:1 |
| White text | 3.60:1 |
Values
| HEX | #647EF3 |
| RGB | rgb(100, 126, 243) |
| HSL | hsl(229, 86%, 67%) |
| OKLCH | oklch(63.2% 0.177 271.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #647EF3 | 3.60:1 | AA large text | Lc -68.9 | Content text, not long reading |
| Black text on #647EF3 | 5.82:1 | AA | Lc 40.7 | Non-text elements, placeholder text |
| #647EF3 text on white | 3.60:1 | AA large text | Lc 63.4 | Content text, not long reading |
| #647EF3 text on black | 5.82:1 | AA | Lc -38.3 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ACBEF9
oklch(80.9% 0.086 271.2)
-
Step 400
400
#819AF6
oklch(70.6% 0.138 271)
-
Step 500
500 (this color)
#647EF3
oklch(63.2% 0.177 271.1)
-
Step 600
600
#4D64E1
oklch(55.6% 0.191 271)
-
Step 700
700
#3F52C4
oklch(49.2% 0.178 271.1)
-
Step 800
800
#33449E
oklch(42.7% 0.147 270.8)
-
Step 900
900
#2C3A7E
oklch(37.7% 0.116 271.1)
-
Step 950
950
#1A234A
oklch(27.1% 0.073 271.1)
#647EF3 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #438DF7 | 0.044 |
| Deuteranopia (no green cones) | #2981F1 | 0.050 |
| Tritanopia (no blue cones) | #0099AD | 0.155 |
| Achromatopsia (no color) | #878787 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647EF3
#647EF3
oklch(63.2% 0.177 271.1)
- #A78600
#A78600
oklch(63.3% 0.129 91.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #647EF3, closest first.
No curated palette has a color within ΔE 0.04 of #647EF3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.015
- Soft Blue #6488EA ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.056
- Medium Slate Blue #7B68EE ΔE 0.056
- Clear Blue #247AFD ΔE 0.059
- Lavender Blue #8B88F8 ΔE 0.060
- Periwinkle #8E82FE ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.062
Use #647EF3 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.