#231D4B
Closest named color: Oxford Blue (#1B263B). oklch(26.6% 0.082 285.3), rgb(35, 29, 75).
Aa
White text reads best on this color (15.56:1).
About this color
#231D4B is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.082 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.046 away. White text reads best on it, at 15.56:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.56:1 |
Values
| HEX | #231D4B |
| RGB | rgb(35, 29, 75) |
| HSL | hsl(248, 44%, 20%) |
| OKLCH | oklch(26.6% 0.082 285.3) |
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 #231D4B | 15.56:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #231D4B | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #231D4B text on white | 15.56:1 | AAA | Lc 102.3 | Preferred for body text |
| #231D4B text on black | 1.34:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E7E8FD
oklch(93.7% 0.028 283.7)
-
Step 200
200
#D5D5FC
oklch(88.5% 0.053 285.3)
-
Step 300
300
#BAB8FD
oklch(80.9% 0.097 285.3)
-
Step 400
400
#9890FC
oklch(70.7% 0.155 285.1)
-
Step 500
500
#8270FA
oklch(63.2% 0.198 285.2)
-
Step 600
600
#6E53E9
oklch(55.7% 0.215 285.3)
-
Step 700
700
#5C41CB
oklch(49% 0.202 285.2)
-
Step 800
800
#4B37A4
oklch(42.7% 0.167 285.3)
-
Step 900
900
#3E3282
oklch(37.8% 0.129 285.3)
-
Step 950
950 (this color)
#231D4B
oklch(26.6% 0.082 285.3)
#231D4B 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) | #04254D | 0.042 |
| Deuteranopia (no green cones) | #02224A | 0.043 |
| Tritanopia (no blue cones) | #152730 | 0.069 |
| Achromatopsia (no color) | #242424 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231D4B
#231D4B
oklch(26.6% 0.082 285.3)
- #2A2700
#2A2700
oklch(26.7% 0.057 105.2)
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 #231D4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.046
- Dark Indigo #1F0954 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.059
- Dark #1B2431 ΔE 0.060
- Marine #042E60 ΔE 0.063
- Dark Purple #35063E ΔE 0.064
- Midnight Blue #191970 ΔE 0.069
- Navy Blue #001146 ΔE 0.070
Use #231D4B 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.