#251D57
Closest named color: Dark Indigo (#1F0954). oklch(27.9% 0.1 284.1), rgb(37, 29, 87).
Aa
White text reads best on this color (15.08:1).
About this color
#251D57 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.100 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.045 away. White text reads best on it, at 15.08:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.39:1 |
| White text | 15.08:1 |
Values
| HEX | #251D57 |
| RGB | rgb(37, 29, 87) |
| HSL | hsl(248, 50%, 23%) |
| OKLCH | oklch(27.9% 0.1 284.1) |
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 #251D57 | 15.08:1 | AAA | Lc -104.5 | Preferred for body text |
| Black text on #251D57 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #251D57 text on white | 15.08:1 | AAA | Lc 101.7 | Preferred for body text |
| #251D57 text on black | 1.39:1 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E8FF
oklch(93.7% 0.031 283.8)
-
Step 200
200
#D4D5FF
oklch(88.6% 0.058 284.1)
-
Step 300
300
#B8B8FF
oklch(80.8% 0.1 283.9)
-
Step 400
400
#9690FF
oklch(70.7% 0.159 284)
-
Step 500
500
#7F6FFF
oklch(63.1% 0.206 283.8)
-
Step 600
600
#6D45FF
oklch(55.6% 0.256 284.2)
-
Step 700
700
#5C30E3
oklch(49.1% 0.246 283.9)
-
Step 800
800
#4B2BB7
oklch(42.8% 0.203 284.2)
-
Step 900
900
#3D2B90
oklch(37.8% 0.158 284.1)
-
Step 950
950 (this color)
#251D57
oklch(27.9% 0.1 284.1)
#251D57 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) | #002859 | 0.048 |
| Deuteranopia (no green cones) | #002456 | 0.046 |
| Tritanopia (no blue cones) | #102B37 | 0.084 |
| Achromatopsia (no color) | #262626 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #251D57
#251D57
oklch(27.9% 0.1 284.1)
- #2E2A00
#2E2A00
oklch(28% 0.059 104)
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 #251D57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.045
- Midnight Blue #191970 ΔE 0.050
- Marine #042E60 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.070
- Dark Purple #35063E ΔE 0.073
- Darkblue #030764 ΔE 0.076
Use #251D57 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.