#00253B
Closest named color: Oxford Blue (#1B263B). oklch(25.2% 0.058 240.3), rgb(0, 37, 59).
Aa
White text reads best on this color (15.81:1).
About this color
#00253B is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.058 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 15.81:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.81:1 |
Values
| HEX | #00253B |
| RGB | rgb(0, 37, 59) |
| HSL | hsl(202, 100%, 12%) |
| OKLCH | oklch(25.2% 0.058 240.3) |
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 #00253B | 15.81:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #00253B | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #00253B text on white | 15.81:1 | AAA | Lc 102.5 | Preferred for body text |
| #00253B 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C3DDF0
oklch(88.4% 0.038 239.6)
-
Step 300
300
#99C7E9
oklch(80.9% 0.068 240.7)
-
Step 400
400
#5BA9DE
oklch(70.7% 0.11 240.5)
-
Step 500
500
#1492D5
oklch(63% 0.141 240.4)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950 (this color)
#00253B
oklch(25.2% 0.058 240.3)
#00253B 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) | #1A253C | 0.028 |
| Deuteranopia (no green cones) | #12203B | 0.023 |
| Tritanopia (no blue cones) | #002B2D | 0.039 |
| Achromatopsia (no color) | #222222 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00253B
#00253B
oklch(25.2% 0.058 240.3)
- #361A01
#361A01
oklch(25.2% 0.058 59.1)
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 #00253B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.033
- Rich Black #0D1B2A ΔE 0.042
- Jet #212529 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.065
- Navy Blue #001146 ΔE 0.068
- Gunmetal #293241 ΔE 0.071
- Marine #042E60 ΔE 0.072
Use #00253B 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.