#21254E
Closest named color: Oxford Blue (#1B263B). oklch(28.5% 0.074 276.4), rgb(33, 37, 78).
Aa
White text reads best on this color (14.59:1).
About this color
#21254E is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.074 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.038 away. White text reads best on it, at 14.59:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.43:1 |
| White text | 14.59:1 |
Values
| HEX | #21254E |
| RGB | rgb(33, 37, 78) |
| HSL | hsl(235, 41%, 22%) |
| OKLCH | oklch(28.5% 0.074 276.4) |
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 #21254E | 14.59:1 | AAA | Lc -104.2 | Preferred for body text |
| Black text on #21254E | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #21254E text on white | 14.59:1 | AAA | Lc 101.3 | Preferred for body text |
| #21254E text on black | 1.43:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B1BCFA
oklch(80.9% 0.089 276.4)
-
Step 400
400
#8A97F7
oklch(70.7% 0.141 276.3)
-
Step 500
500
#707AF4
oklch(63.2% 0.18 276.4)
-
Step 600
600
#5A5FE2
oklch(55.6% 0.195 276.3)
-
Step 700
700
#4B4DC5
oklch(49.1% 0.183 276.6)
-
Step 800
800
#3D409F
oklch(42.7% 0.151 276.5)
-
Step 900
900
#33387E
oklch(37.7% 0.117 276.2)
-
Step 950
950 (this color)
#21254E
oklch(28.5% 0.074 276.4)
#21254E 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) | #122B4F | 0.025 |
| Deuteranopia (no green cones) | #0D274D | 0.025 |
| Tritanopia (no blue cones) | #0D2E35 | 0.066 |
| Achromatopsia (no color) | #292929 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21254E
#21254E
oklch(28.5% 0.074 276.4)
- #332A00
#332A00
oklch(28.6% 0.059 96.5)
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 #21254E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.042
- Marine #042E60 ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.050
- Dark #1B2431 ΔE 0.056
- Gunmetal #293241 ΔE 0.056
- Dark Indigo #1F0954 ΔE 0.068
- Midnight Blue #191970 ΔE 0.070
Use #21254E 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.