#6370A2
Closest named color: Dull Blue (#49759C). oklch(55.5% 0.08 272.4), rgb(99, 112, 162).
Aa
White text reads best on this color (4.80:1).
About this color
#6370A2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.080 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.036 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.36:1 |
| White text | 4.80:1 |
Values
| HEX | #6370A2 |
| RGB | rgb(99, 112, 162) |
| HSL | hsl(228, 25%, 51%) |
| OKLCH | oklch(55.5% 0.08 272.4) |
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 #6370A2 | 4.80:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #6370A2 | 4.36:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #6370A2 text on white | 4.80:1 | AA | Lc 73.3 | Content text, not long reading |
| #6370A2 text on black | 4.36:1 | AA large text | Lc -28.4 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B8C0D8
oklch(80.9% 0.035 271)
-
Step 400
400
#949FC5
oklch(70.7% 0.057 272.3)
-
Step 500
500
#7A87B6
oklch(63.1% 0.073 272.2)
-
Step 600
600 (this color)
#6370A2
oklch(55.5% 0.08 272.4)
-
Step 700
700
#525E8B
oklch(49.1% 0.074 272)
-
Step 800
800
#434D71
oklch(42.7% 0.061 271.7)
-
Step 900
900
#39405B
oklch(37.7% 0.047 272.8)
-
Step 950
950
#212635
oklch(27.1% 0.029 270.1)
#6370A2 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) | #5F75A4 | 0.014 |
| Deuteranopia (no green cones) | #5A70A1 | 0.012 |
| Tritanopia (no blue cones) | #507A82 | 0.071 |
| Achromatopsia (no color) | #727272 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6370A2
#6370A2
oklch(55.5% 0.08 272.4)
- #837239
#837239
oklch(55.5% 0.079 93.1)
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 #6370A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.036
- Stormy Blue #507B9C ΔE 0.041
- Flat Blue #3C73A8 ΔE 0.044
- Metallic Blue #4F738E ΔE 0.045
- Muted Blue #3B719F ΔE 0.047
- Cerulean #457B9D ΔE 0.047
- French Blue #436BAD ΔE 0.047
- Dark Lavender #856798 ΔE 0.055
Use #6370A2 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.