#231F39
Closest named color: Oxford Blue (#1B263B). oklch(25.7% 0.048 289.6), rgb(35, 31, 57).
Aa
White text reads best on this color (15.83:1).
About this color
#231F39 is a dark, muted purple. In OKLCH its lightness is 26%, its chroma 0.048 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.025 away. White text reads best on it, at 15.83:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.83:1 |
Values
| HEX | #231F39 |
| RGB | rgb(35, 31, 57) |
| HSL | hsl(249, 30%, 17%) |
| OKLCH | oklch(25.7% 0.048 289.6) |
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 #231F39 | 15.83:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #231F39 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #231F39 text on white | 15.83:1 | AAA | Lc 102.7 | Preferred for body text |
| #231F39 text on black | 1.32:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F5
oklch(93.6% 0.017 289.6)
-
Step 200
200
#D8D6ED
oklch(88.5% 0.031 289.7)
-
Step 300
300
#BFBBE4
oklch(80.9% 0.057 289.5)
-
Step 400
400
#9F97D6
oklch(70.7% 0.091 289.7)
-
Step 500
500
#887CCB
oklch(63% 0.117 289.6)
-
Step 600
600
#7364B8
oklch(55.6% 0.127 289.8)
-
Step 700
700
#60539E
oklch(49.1% 0.117 289.3)
-
Step 800
800
#4F4480
oklch(42.7% 0.097 290.1)
-
Step 900
900
#413A67
oklch(37.7% 0.076 289.4)
-
Step 950
950 (this color)
#231F39
oklch(25.7% 0.048 289.6)
#231F39 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) | #17233A | 0.022 |
| Deuteranopia (no green cones) | #172238 | 0.022 |
| Tritanopia (no blue cones) | #1E2429 | 0.040 |
| Achromatopsia (no color) | #222222 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231F39
#231F39
oklch(25.7% 0.048 289.6)
- #252506
#252506
oklch(25.7% 0.048 109.3)
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 #231F39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.025
- Dark #1B2431 ΔE 0.029
- Jet #212529 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.050
- Gunmetal #293241 ΔE 0.064
- Eggplant #380835 ΔE 0.068
- Dark Purple #35063E ΔE 0.069
Use #231F39 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.