#6372B1
Closest named color: French Blue (#436BAD). oklch(56.7% 0.099 272.7), rgb(99, 114, 177).
Aa
White text reads best on this color (4.59:1).
About this color
#6372B1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.099 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.046 away. White text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.57:1 |
| White text | 4.59:1 |
Values
| HEX | #6372B1 |
| RGB | rgb(99, 114, 177) |
| HSL | hsl(228, 33%, 54%) |
| OKLCH | oklch(56.7% 0.099 272.7) |
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 #6372B1 | 4.59:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #6372B1 | 4.57:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #6372B1 text on white | 4.59:1 | AA | Lc 71.8 | Content text, not long reading |
| #6372B1 text on black | 4.57:1 | AA | Lc -29.9 | 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
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D3D8EA
oklch(88.4% 0.025 273.5)
-
Step 300
300
#B7BFDE
oklch(80.8% 0.045 273.9)
-
Step 400
400
#919ECE
oklch(70.7% 0.072 272.7)
-
Step 500
500
#7786C1
oklch(63.2% 0.091 272.6)
-
Step 600
600 (this color)
#6372B1
oklch(56.7% 0.099 272.7)
-
Step 700
700
#4F5C95
oklch(49% 0.093 272.8)
-
Step 800
800
#414C79
oklch(42.8% 0.076 272.4)
-
Step 900
900
#373F61
oklch(37.6% 0.059 273.1)
-
Step 950
950
#202539
oklch(26.9% 0.038 272.9)
#6372B1 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) | #5C79B4 | 0.020 |
| Deuteranopia (no green cones) | #5572B0 | 0.018 |
| Tritanopia (no blue cones) | #487F89 | 0.089 |
| Achromatopsia (no color) | #757575 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6372B1
#6372B1
oklch(56.7% 0.099 272.7)
- #8B7527
#8B7527
oklch(56.8% 0.099 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 #6372B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.048
- Windows Blue #3778BF ΔE 0.049
- Dull Blue #49759C ΔE 0.049
- Steel Blue #4682B4 ΔE 0.051
- Stormy Blue #507B9C ΔE 0.052
- Off Blue #5684AE ΔE 0.053
- Cool Blue #4984B8 ΔE 0.053
Use #6372B1 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.