#647AFB
Closest named color: Cornflower (#6A79F7). oklch(62.9% 0.192 272.4), rgb(100, 122, 251).
Aa
Black text reads best on this color (5.71:1).
About this color
#647AFB is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.192 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.009 away. Black text reads best on it, at 5.71:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.71:1 |
| White text | 3.67:1 |
Values
| HEX | #647AFB |
| RGB | rgb(100, 122, 251) |
| HSL | hsl(231, 95%, 69%) |
| OKLCH | oklch(62.9% 0.192 272.4) |
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 #647AFB | 3.67:1 | AA large text | Lc -69.5 | Content text, not long reading |
| Black text on #647AFB | 5.71:1 | AA | Lc 40.1 | Non-text elements, placeholder text |
| #647AFB text on white | 3.67:1 | AA large text | Lc 64.0 | Content text, not long reading |
| #647AFB text on black | 5.71:1 | AA | Lc -37.7 | 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
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CDD8FD
oklch(88.6% 0.052 272.2)
-
Step 300
300
#ACBDFE
oklch(80.9% 0.094 272.8)
-
Step 400
400
#8198FE
oklch(70.7% 0.151 272.4)
-
Step 500
500 (this color)
#647AFB
oklch(62.9% 0.192 272.4)
-
Step 600
600
#4F5FEB
oklch(55.6% 0.209 272.6)
-
Step 700
700
#404DCC
oklch(49% 0.195 272.4)
-
Step 800
800
#3440A5
oklch(42.6% 0.162 272.4)
-
Step 900
900
#2D3883
oklch(37.7% 0.126 272.6)
-
Step 950
950
#1A224D
oklch(27.1% 0.079 272.1)
#647AFB 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) | #2D8CFF | 0.058 |
| Deuteranopia (no green cones) | #007FF8 | 0.063 |
| Tritanopia (no blue cones) | #0098AF | 0.165 |
| Achromatopsia (no color) | #858585 | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647AFB
#647AFB
oklch(62.9% 0.192 272.4)
- #A48600
#A48600
oklch(63% 0.129 93)
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 #647AFB, closest first.
No curated palette has a color within ΔE 0.04 of #647AFB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.009
- Soft Blue #6488EA ΔE 0.046
- Medium Slate Blue #7B68EE ΔE 0.051
- Clear Blue #247AFD ΔE 0.055
- Periwinkle #8E82FE ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.066
- Dodger Blue #1E90FF ΔE 0.068
- Dark Sky Blue #448EE4 ΔE 0.070
Use #647AFB 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.