#231E3B
Closest named color: Oxford Blue (#1B263B). oklch(25.6% 0.054 290), rgb(35, 30, 59).
Aa
White text reads best on this color (15.90:1).
About this color
#231E3B is a dark, muted purple. In OKLCH its lightness is 26%, its chroma 0.054 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.028 away. White text reads best on it, at 15.90:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.90:1 |
Values
| HEX | #231E3B |
| RGB | rgb(35, 30, 59) |
| HSL | hsl(250, 33%, 17%) |
| OKLCH | oklch(25.6% 0.054 290) |
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 #231E3B | 15.90:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #231E3B | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #231E3B text on white | 15.90:1 | AAA | Lc 102.8 | Preferred for body text |
| #231E3B 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D8D6EF
oklch(88.5% 0.034 289.4)
-
Step 300
300
#BFBAE8
oklch(80.8% 0.065 289.9)
-
Step 400
400
#9F96DC
oklch(70.7% 0.101 289.4)
-
Step 500
500
#897AD2
oklch(63.1% 0.13 290)
-
Step 600
600
#7461BF
oklch(55.5% 0.142 290.3)
-
Step 700
700
#6150A5
oklch(49.1% 0.132 289.9)
-
Step 800
800
#4F4286
oklch(42.7% 0.109 289.7)
-
Step 900
900
#42386B
oklch(37.7% 0.085 290.7)
-
Step 950
950 (this color)
#231E3B
oklch(25.6% 0.054 290)
#231E3B 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) | #15233C | 0.026 |
| Deuteranopia (no green cones) | #15213A | 0.025 |
| Tritanopia (no blue cones) | #1D2429 | 0.046 |
| Achromatopsia (no color) | #222222 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231E3B
#231E3B
oklch(25.6% 0.054 290)
- #252502
#252502
oklch(25.6% 0.053 109.6)
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 #231E3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.028
- Dark #1B2431 ΔE 0.034
- Jet #212529 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.052
- Eggplant #380835 ΔE 0.066
- Dark Purple #35063E ΔE 0.066
- Gunmetal #293241 ΔE 0.067
Use #231E3B 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.