#231F31
Closest named color: Dark (#1B2431). oklch(25.2% 0.034 294), rgb(35, 31, 49).
Aa
White text reads best on this color (16.00:1).
About this color
#231F31 is a dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.034 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.021 away. White text reads best on it, at 16.00:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | muted (0.034) |
| Temperature | in between |
| Nearest name | Dark (#1B2431) |
| Black text | 1.31:1 |
| White text | 16.00:1 |
Values
| HEX | #231F31 |
| RGB | rgb(35, 31, 49) |
| HSL | hsl(253, 23%, 16%) |
| OKLCH | oklch(25.2% 0.034 294) |
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 #231F31 | 16.00:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #231F31 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #231F31 text on white | 16.00:1 | AAA | Lc 103.0 | Preferred for body text |
| #231F31 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE8F1
oklch(93.5% 0.012 296.3)
-
Step 200
200
#D9D7E7
oklch(88.6% 0.022 291.7)
-
Step 300
300
#C1BCD9
oklch(80.9% 0.041 293.4)
-
Step 400
400
#A299C5
oklch(70.6% 0.064 294.1)
-
Step 500
500
#8C80B7
oklch(63.1% 0.082 293.9)
-
Step 600
600
#7669A3
oklch(55.7% 0.089 293.6)
-
Step 700
700
#63578B
oklch(49.1% 0.083 293.7)
-
Step 800
800
#514771
oklch(42.6% 0.069 294.2)
-
Step 900
900
#433C5B
oklch(37.7% 0.053 294.1)
-
Step 950
950 (this color)
#231F31
oklch(25.2% 0.034 294)
#231F31 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) | #1B2232 | 0.016 |
| Deuteranopia (no green cones) | #1B2131 | 0.015 |
| Tritanopia (no blue cones) | #202225 | 0.029 |
| Achromatopsia (no color) | #212121 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231F31
#231F31
oklch(25.2% 0.034 294)
- #222410
#222410
oklch(25.2% 0.034 113.5)
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 #231F31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.021
- Oxford Blue #1B263B ΔE 0.028
- Jet #212529 ΔE 0.030
- Rich Black #0D1B2A ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.053
- Gunmetal #293241 ΔE 0.066
- Eggplant #380835 ΔE 0.071
- Dark Purple #35063E ΔE 0.076
Use #231F31 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.