#231B47
Closest named color: Oxford Blue (#1B263B). oklch(25.9% 0.079 287.9), rgb(35, 27, 71).
Aa
White text reads best on this color (15.91:1).
About this color
#231B47 is a dark, moderately saturated purple. In OKLCH its lightness is 26%, its chroma 0.079 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.046 away. White text reads best on it, at 15.91:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.91:1 |
Values
| HEX | #231B47 |
| RGB | rgb(35, 27, 71) |
| HSL | hsl(251, 45%, 19%) |
| OKLCH | oklch(25.9% 0.079 287.9) |
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 #231B47 | 15.91:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #231B47 | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #231B47 text on white | 15.91:1 | AAA | Lc 102.7 | Preferred for body text |
| #231B47 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E8E7FC
oklch(93.5% 0.028 288)
-
Step 200
200
#D7D4FA
oklch(88.4% 0.052 288.9)
-
Step 300
300
#BDB7FA
oklch(80.8% 0.094 288.2)
-
Step 400
400
#9D8FF8
oklch(70.7% 0.15 288)
-
Step 500
500
#876FF4
oklch(63% 0.191 287.9)
-
Step 600
600
#7353E3
oklch(55.6% 0.208 287.9)
-
Step 700
700
#6142C5
oklch(49.1% 0.193 288)
-
Step 800
800
#4F379F
oklch(42.6% 0.16 288.3)
-
Step 900
900
#41327F
oklch(37.8% 0.125 287.9)
-
Step 950
950 (this color)
#231B47
oklch(25.9% 0.079 287.9)
#231B47 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) | #042348 | 0.044 |
| Deuteranopia (no green cones) | #042146 | 0.043 |
| Tritanopia (no blue cones) | #18252E | 0.065 |
| Achromatopsia (no color) | #222222 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231B47
#231B47
oklch(25.9% 0.079 287.9)
- #272500
#272500
oklch(25.8% 0.055 106.6)
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 #231B47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.046
- Dark Indigo #1F0954 ΔE 0.047
- Dark #1B2431 ΔE 0.057
- Dark Purple #35063E ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.062
- Deep Purple #36013F ΔE 0.066
- Eggplant #380835 ΔE 0.067
- Navy Blue #001146 ΔE 0.067
Use #231B47 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.