#251B41
Closest named color: Oxford Blue (#1B263B). oklch(25.6% 0.069 293), rgb(37, 27, 65).
Aa
White text reads best on this color (16.00:1).
About this color
#251B41 is a dark, muted purple. In OKLCH its lightness is 26%, its chroma 0.069 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.041 away. White text reads best on it, at 16.00:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | muted (0.069) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 16.00:1 |
Values
| HEX | #251B41 |
| RGB | rgb(37, 27, 65) |
| HSL | hsl(256, 41%, 18%) |
| OKLCH | oklch(25.6% 0.069 293) |
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 #251B41 | 16.00:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #251B41 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #251B41 text on white | 16.00:1 | AAA | Lc 102.8 | Preferred for body text |
| #251B41 text on black | 1.31:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#DAD4F5
oklch(88.5% 0.045 293.8)
-
Step 300
300
#C2B7F2
oklch(80.9% 0.083 293)
-
Step 400
400
#A490EB
oklch(70.8% 0.131 292.8)
-
Step 500
500
#8F71E4
oklch(63% 0.168 293)
-
Step 600
600
#7B56D2
oklch(55.6% 0.183 293.3)
-
Step 700
700
#6846B6
oklch(49.2% 0.169 293.2)
-
Step 800
800
#543A93
oklch(42.6% 0.14 293)
-
Step 900
900
#453375
oklch(37.7% 0.109 293)
-
Step 950
950 (this color)
#251B41
oklch(25.6% 0.069 293)
#251B41 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) | #0C2242 | 0.041 |
| Deuteranopia (no green cones) | #0D2140 | 0.040 |
| Tritanopia (no blue cones) | #1E232B | 0.056 |
| Achromatopsia (no color) | #212121 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #251B41
#251B41
oklch(25.6% 0.069 293)
- #232600
#232600
oklch(25.7% 0.058 114.2)
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 #251B41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.041
- Dark #1B2431 ΔE 0.049
- Dark Purple #35063E ΔE 0.055
- Dark Indigo #1F0954 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.059
- Eggplant #380835 ΔE 0.059
- Rich Black #0D1B2A ΔE 0.062
- Deep Purple #36013F ΔE 0.063
Use #251B41 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.