#231E4B
Closest named color: Oxford Blue (#1B263B). oklch(26.8% 0.08 284.6), rgb(35, 30, 75).
Aa
White text reads best on this color (15.45:1).
About this color
#231E4B is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.080 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.044 away. White text reads best on it, at 15.45:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.35:1 |
| White text | 15.45:1 |
Values
| HEX | #231E4B |
| RGB | rgb(35, 30, 75) |
| HSL | hsl(247, 43%, 21%) |
| OKLCH | oklch(26.8% 0.08 284.6) |
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 #231E4B | 15.45:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #231E4B | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #231E4B text on white | 15.45:1 | AAA | Lc 102.2 | Preferred for body text |
| #231E4B text on black | 1.35:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D4D5FC
oklch(88.5% 0.053 284.1)
-
Step 300
300
#B9B8FC
oklch(80.8% 0.095 284.7)
-
Step 400
400
#9791FB
oklch(70.7% 0.152 284.4)
-
Step 500
500
#8171F8
oklch(63.1% 0.194 284.8)
-
Step 600
600
#6C54E7
oklch(55.5% 0.212 284.6)
-
Step 700
700
#5B43C9
oklch(49.1% 0.197 284.7)
-
Step 800
800
#4A39A2
oklch(42.7% 0.162 284.6)
-
Step 900
900
#3D3281
oklch(37.6% 0.128 284.8)
-
Step 950
950 (this color)
#231E4B
oklch(26.8% 0.08 284.6)
#231E4B 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) | #06264D | 0.040 |
| Deuteranopia (no green cones) | #04234A | 0.041 |
| Tritanopia (no blue cones) | #152831 | 0.068 |
| Achromatopsia (no color) | #242424 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231E4B
#231E4B
oklch(26.8% 0.08 284.6)
- #2B2700
#2B2700
oklch(26.9% 0.057 103.7)
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 #231E4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.044
- Dark Indigo #1F0954 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.056
- Dark #1B2431 ΔE 0.058
- Marine #042E60 ΔE 0.061
- Dark Purple #35063E ΔE 0.066
- Midnight Blue #191970 ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.070
Use #231E4B 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.