#231A3B
Closest named color: Oxford Blue (#1B263B). oklch(24.7% 0.061 294), rgb(35, 26, 59).
Aa
White text reads best on this color (16.37:1).
About this color
#231A3B is a very dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.061 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.040 away. White text reads best on it, at 16.37:1.
| Hue family | Purples |
| Lightness | very dark (25%) |
| Chroma | muted (0.061) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.37:1 |
Values
| HEX | #231A3B |
| RGB | rgb(35, 26, 59) |
| HSL | hsl(256, 39%, 17%) |
| OKLCH | oklch(24.7% 0.061 294) |
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 #231A3B | 16.37:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #231A3B | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #231A3B text on white | 16.37:1 | AAA | Lc 103.2 | Preferred for body text |
| #231A3B text on black | 1.28:1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EAE7F7
oklch(93.5% 0.022 294.6)
-
Step 200
200
#DAD5F2
oklch(88.6% 0.04 293.5)
-
Step 300
300
#C3B8EC
oklch(80.9% 0.073 294.4)
-
Step 400
400
#A592E2
oklch(70.8% 0.116 294.1)
-
Step 500
500
#9075D9
oklch(63.2% 0.147 294.2)
-
Step 600
600
#7B5BC7
oklch(55.6% 0.162 294.2)
-
Step 700
700
#674AAC
oklch(49% 0.15 293.8)
-
Step 800
800
#543D8B
oklch(42.6% 0.125 294.1)
-
Step 900
900
#45356F
oklch(37.6% 0.097 294)
-
Step 950
950 (this color)
#231A3B
oklch(24.7% 0.061 294)
#231A3B 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) | #0E203C | 0.036 |
| Deuteranopia (no green cones) | #101F3A | 0.034 |
| Tritanopia (no blue cones) | #1D2027 | 0.049 |
| Achromatopsia (no color) | #202020 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231A3B
#231A3B
oklch(24.7% 0.061 294)
- #212400
#212400
oklch(24.9% 0.056 114.4)
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 #231A3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.040
- Dark #1B2431 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.052
- Dark Purple #35063E ΔE 0.057
- Jet #212529 ΔE 0.057
- Eggplant #380835 ΔE 0.059
- Midnight Purple #280137 ΔE 0.061
- Dark Indigo #1F0954 ΔE 0.062
Use #231A3B 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.