#0D233B
Closest named color: Oxford Blue (#1B263B). oklch(25.2% 0.054 252.5), rgb(13, 35, 59).
Aa
White text reads best on this color (15.90:1).
About this color
#0D233B is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.054 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.022 away. White text reads best on it, at 15.90:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.90:1 |
Values
| HEX | #0D233B |
| RGB | rgb(13, 35, 59) |
| HSL | hsl(211, 64%, 14%) |
| OKLCH | oklch(25.2% 0.054 252.5) |
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 #0D233B | 15.90:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #0D233B | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #0D233B text on white | 15.90:1 | AAA | Lc 102.7 | Preferred for body text |
| #0D233B text on black | 1.32:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A4C4E9
oklch(80.9% 0.063 252.3)
-
Step 400
400
#71A4DE
oklch(70.6% 0.101 252.4)
-
Step 500
500
#4A8CD5
oklch(63% 0.13 252.6)
-
Step 600
600
#2A75C3
oklch(55.6% 0.141 252.6)
-
Step 700
700
#1B62A8
oklch(49.1% 0.131 252.3)
-
Step 800
800
#1A5088
oklch(42.7% 0.108 252.6)
-
Step 900
900
#1C436D
oklch(37.7% 0.085 252.5)
-
Step 950
950 (this color)
#0D233B
oklch(25.2% 0.054 252.5)
#0D233B 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) | #18243C | 0.015 |
| Deuteranopia (no green cones) | #12203B | 0.011 |
| Tritanopia (no blue cones) | #00292C | 0.042 |
| Achromatopsia (no color) | #222222 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D233B
#0D233B
oklch(25.2% 0.054 252.5)
- #321D00
#321D00
oklch(25.2% 0.054 71.6)
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 #0D233B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.022
- Dark #1B2431 ΔE 0.027
- Rich Black #0D1B2A ΔE 0.039
- Jet #212529 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.059
- Navy Blue #001146 ΔE 0.065
- Gunmetal #293241 ΔE 0.068
- Marine #042E60 ΔE 0.071
Use #0D233B 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.