#231C3F
Closest named color: Oxford Blue (#1B263B). oklch(25.5% 0.064 290.3), rgb(35, 28, 63).
Aa
White text reads best on this color (16.03:1).
About this color
#231C3F is a dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.064 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.036 away. White text reads best on it, at 16.03:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.03:1 |
Values
| HEX | #231C3F |
| RGB | rgb(35, 28, 63) |
| HSL | hsl(252, 38%, 18%) |
| OKLCH | oklch(25.5% 0.064 290.3) |
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 #231C3F | 16.03:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #231C3F | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #231C3F text on white | 16.03:1 | AAA | Lc 102.9 | Preferred for body text |
| #231C3F text on black | 1.30:1 | 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
#D8D5F4
oklch(88.5% 0.042 289.9)
-
Step 300
300
#BFB9EF
oklch(80.9% 0.076 289.7)
-
Step 400
400
#A093E7
oklch(70.8% 0.121 290)
-
Step 500
500
#8A75E0
oklch(63% 0.157 290.2)
-
Step 600
600
#755BCD
oklch(55.5% 0.169 290.3)
-
Step 700
700
#634AB2
oklch(49.1% 0.158 290.4)
-
Step 800
800
#503E90
oklch(42.7% 0.13 289.9)
-
Step 900
900
#423573
oklch(37.6% 0.103 290.2)
-
Step 950
950 (this color)
#231C3F
oklch(25.5% 0.064 290.3)
#231C3F 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) | #0F2240 | 0.034 |
| Deuteranopia (no green cones) | #0F213E | 0.034 |
| Tritanopia (no blue cones) | #1C232A | 0.053 |
| Achromatopsia (no color) | #212121 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231C3F
#231C3F
oklch(25.5% 0.064 290.3)
- #242500
#242500
oklch(25.5% 0.056 111.3)
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 #231C3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.036
- Dark #1B2431 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.057
- Jet #212529 ΔE 0.058
- Dark Purple #35063E ΔE 0.060
- Dark Indigo #1F0954 ΔE 0.060
- Eggplant #380835 ΔE 0.063
Use #231C3F 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.