#231D3F
Closest named color: Oxford Blue (#1B263B). oklch(25.7% 0.062 289.4), rgb(35, 29, 63).
Aa
White text reads best on this color (15.92:1).
About this color
#231D3F is a dark, muted purple. In OKLCH its lightness is 26%, its chroma 0.062 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.033 away. White text reads best on it, at 15.92:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.92:1 |
Values
| HEX | #231D3F |
| RGB | rgb(35, 29, 63) |
| HSL | hsl(251, 37%, 18%) |
| OKLCH | oklch(25.7% 0.062 289.4) |
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 #231D3F | 15.92:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #231D3F | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #231D3F text on white | 15.92:1 | AAA | Lc 102.8 | Preferred for body text |
| #231D3F 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
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D8D5F3
oklch(88.5% 0.041 290.1)
-
Step 300
300
#BFB9EE
oklch(80.9% 0.074 289.8)
-
Step 400
400
#9F94E5
oklch(70.8% 0.117 289.3)
-
Step 500
500
#8977DE
oklch(63.2% 0.151 289.4)
-
Step 600
600
#745DCB
oklch(55.6% 0.164 289.6)
-
Step 700
700
#614CB0
oklch(49.1% 0.153 289.2)
-
Step 800
800
#4F3F8E
oklch(42.7% 0.126 289.3)
-
Step 900
900
#413672
oklch(37.6% 0.099 289.1)
-
Step 950
950 (this color)
#231D3F
oklch(25.7% 0.062 289.4)
#231D3F 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) | #102340 | 0.033 |
| Deuteranopia (no green cones) | #11213E | 0.030 |
| Tritanopia (no blue cones) | #1B242B | 0.052 |
| Achromatopsia (no color) | #222222 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231D3F
#231D3F
oklch(25.7% 0.062 289.4)
- #252500
#252500
oklch(25.6% 0.056 109.8)
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 #231D3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Dark #1B2431 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.055
- Jet #212529 ΔE 0.056
- Rich Black #0D1B2A ΔE 0.057
- Dark Purple #35063E ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.062
- Eggplant #380835 ΔE 0.064
Use #231D3F 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.