#6367B5
Closest named color: French Blue (#436BAD). oklch(54.7% 0.12 279.4), rgb(99, 103, 181).
Aa
White text reads best on this color (5.07:1).
About this color
#6367B5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.120 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.043 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #6367B5 |
| RGB | rgb(99, 103, 181) |
| HSL | hsl(237, 36%, 55%) |
| OKLCH | oklch(54.7% 0.12 279.4) |
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 #6367B5 | 5.07:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #6367B5 | 4.13:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #6367B5 text on white | 5.07:1 | AA | Lc 74.9 | Content text, not long reading |
| #6367B5 text on black | 4.13:1 | AA large text | Lc -26.8 | Dividers and decoration only |
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 600.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D8ED
oklch(88.6% 0.029 277.2)
-
Step 300
300
#B9BEE4
oklch(81% 0.054 279.2)
-
Step 400
400
#959BD6
oklch(70.7% 0.086 279.4)
-
Step 500
500
#7C81CB
oklch(63% 0.111 279.8)
-
Step 600
600 (this color)
#6367B5
oklch(54.7% 0.12 279.4)
-
Step 700
700
#54589F
oklch(49.1% 0.112 279)
-
Step 800
800
#454880
oklch(42.7% 0.092 279.4)
-
Step 900
900
#3A3D67
oklch(37.8% 0.071 279.3)
-
Step 950
950
#22243C
oklch(27.1% 0.045 279.3)
#6367B5 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) | #4972B8 | 0.040 |
| Deuteranopia (no green cones) | #446BB3 | 0.039 |
| Tritanopia (no blue cones) | #477785 | 0.105 |
| Achromatopsia (no color) | #6E6E6E | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6367B5
#6367B5
oklch(54.7% 0.12 279.4)
- #817100
#817100
oklch(54.7% 0.113 99.4)
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 #6367B5, closest first.
No curated palette has a color within ΔE 0.04 of #6367B5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.043
- Iris #6258C4 ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.060
- Windows Blue #3778BF ΔE 0.061
- Mid Blue #276AB3 ΔE 0.064
Use #6367B5 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.