#25283D
Closest named color: Oxford Blue (#1B263B). oklch(28.4% 0.039 277.4), rgb(37, 40, 61).
Aa
White text reads best on this color (14.48:1).
About this color
#25283D is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.039 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.018 away. White text reads best on it, at 14.48:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.44:1 |
| White text | 14.48:1 |
Values
| HEX | #25283D |
| RGB | rgb(37, 40, 61) |
| HSL | hsl(233, 24%, 19%) |
| OKLCH | oklch(28.4% 0.039 277.4) |
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 #25283D | 14.48:1 | AAA | Lc -104.2 | Preferred for body text |
| Black text on #25283D | 1.44:1 | Fails | Lc 0.0 | Not readable |
| #25283D text on white | 14.48:1 | AAA | Lc 101.3 | Preferred for body text |
| #25283D text on black | 1.44:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B9BEDF
oklch(80.8% 0.047 278.5)
-
Step 400
400
#959DCF
oklch(70.8% 0.074 277.3)
-
Step 500
500
#7B84C2
oklch(63.1% 0.094 277)
-
Step 600
600
#656DAE
oklch(55.7% 0.101 277.2)
-
Step 700
700
#545B96
oklch(49.2% 0.094 277.2)
-
Step 800
800
#454A7A
oklch(42.7% 0.079 277.9)
-
Step 900
900
#3A3E62
oklch(37.7% 0.062 278.2)
-
Step 950
950 (this color)
#25283D
oklch(28.4% 0.039 277.4)
#25283D 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) | #212A3E | 0.008 |
| Deuteranopia (no green cones) | #20283C | 0.009 |
| Tritanopia (no blue cones) | #1E2C2F | 0.035 |
| Achromatopsia (no color) | #292929 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25283D
#25283D
oklch(28.4% 0.039 277.4)
- #2F2A12
#2F2A12
oklch(28.4% 0.039 97.8)
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 #25283D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.018
- Space Cadet #2B2D42 ΔE 0.021
- Dark #1B2431 ΔE 0.030
- Gunmetal #293241 ΔE 0.034
- Jet #212529 ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.062
- Midnight Green #073B4C ΔE 0.064
Use #25283D 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.