#263B6B
Closest named color: Marine Blue (#01386A). oklch(36.1% 0.087 264.6), rgb(38, 59, 107).
Aa
White text reads best on this color (10.93:1).
About this color
#263B6B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.087 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.033 away. White text reads best on it, at 10.93:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.92:1 |
| White text | 10.93:1 |
Values
| HEX | #263B6B |
| RGB | rgb(38, 59, 107) |
| HSL | hsl(222, 48%, 28%) |
| OKLCH | oklch(36.1% 0.087 264.6) |
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 #263B6B | 10.93:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #263B6B | 1.92:1 | Fails | Lc 8.8 | Not readable |
| #263B6B text on white | 10.93:1 | AAA | Lc 95.1 | Preferred for body text |
| #263B6B text on black | 1.92:1 | Fails | Lc -7.5 | Not readable |
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 900.
-
Step 50
50
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EC
oklch(81% 0.065 264.5)
-
Step 400
400
#809FE2
oklch(70.6% 0.105 264.8)
-
Step 500
500
#6086DA
oklch(63% 0.134 264.5)
-
Step 600
600
#486EC8
oklch(55.6% 0.146 264.8)
-
Step 700
700
#395CAD
oklch(49.2% 0.136 264.4)
-
Step 800
800
#304B8C
oklch(42.7% 0.113 265)
-
Step 900
900 (this color)
#263B6B
oklch(36.1% 0.087 264.6)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#263B6B 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) | #25406D | 0.015 |
| Deuteranopia (no green cones) | #1B3A6A | 0.013 |
| Tritanopia (no blue cones) | #00464D | 0.076 |
| Achromatopsia (no color) | #3D3D3D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263B6B
#263B6B
oklch(36.1% 0.087 264.6)
- #4F3900
#4F3900
oklch(36% 0.074 84.3)
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 #263B6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.033
- Twilight Blue #0A437A ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.055
- Marine #042E60 ΔE 0.057
- Charcoal #264653 ΔE 0.061
- Midnight Green #073B4C ΔE 0.064
Use #263B6B 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.