#646BFA
Closest named color: Cornflower (#6A79F7). oklch(60.1% 0.209 276), rgb(100, 107, 250).
Aa
Black text reads best on this color (5.02:1).
About this color
#646BFA is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.209 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.036 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.209) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #646BFA |
| RGB | rgb(100, 107, 250) |
| HSL | hsl(237, 94%, 69%) |
| OKLCH | oklch(60.1% 0.209 276) |
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 #646BFA | 4.17:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #646BFA | 5.02:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #646BFA text on white | 4.17:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #646BFA text on black | 5.02:1 | AA | Lc -33.3 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CED7FF
oklch(88.5% 0.056 275.2)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8896FF
oklch(70.8% 0.153 276)
-
Step 500
500 (this color)
#646BFA
oklch(60.1% 0.209 276)
-
Step 600
600
#5758F4
oklch(55.7% 0.227 275.8)
-
Step 700
700
#4846D5
oklch(49.1% 0.212 275.9)
-
Step 800
800
#3B3BAC
oklch(42.8% 0.175 276)
-
Step 900
900
#313488
oklch(37.6% 0.137 276)
-
Step 950
950
#1C2050
oklch(27.1% 0.087 275.4)
#646BFA 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) | #0082FF | 0.076 |
| Deuteranopia (no green cones) | #0076F7 | 0.069 |
| Tritanopia (no blue cones) | #008DA8 | 0.178 |
| Achromatopsia (no color) | #7C7C7C | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646BFA
#646BFA
oklch(60.1% 0.209 276)
- #977F00
#977F00
oklch(60.1% 0.124 95.7)
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 #646BFA, closest first.
No curated palette has a color within ΔE 0.04 of #646BFA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.036
- Medium Slate Blue #7B68EE ΔE 0.037
- Neon Blue #4361EE ΔE 0.053
- Royal Blue #4169E1 ΔE 0.057
- Clear Blue #247AFD ΔE 0.061
- Dark Periwinkle #665FD1 ΔE 0.066
- Purpley #8756E4 ΔE 0.072
- Cerulean Blue #056EEE ΔE 0.074
Use #646BFA 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.