#231F4F
Closest named color: Oxford Blue (#1B263B). oklch(27.4% 0.085 283), rgb(35, 31, 79).
Aa
White text reads best on this color (15.21:1).
About this color
#231F4F is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.085 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.048 away. White text reads best on it, at 15.21:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.21:1 |
Values
| HEX | #231F4F |
| RGB | rgb(35, 31, 79) |
| HSL | hsl(245, 44%, 22%) |
| OKLCH | oklch(27.4% 0.085 283) |
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 #231F4F | 15.21:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #231F4F | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #231F4F text on white | 15.21:1 | AAA | Lc 101.9 | Preferred for body text |
| #231F4F text on black | 1.38:1 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E8FD
oklch(93.7% 0.028 283.7)
-
Step 200
200
#D3D5FE
oklch(88.5% 0.056 283)
-
Step 300
300
#B7B9FF
oklch(80.9% 0.098 282.7)
-
Step 400
400
#9491FF
oklch(70.7% 0.158 282.8)
-
Step 500
500
#7D70FF
oklch(63.1% 0.205 282.9)
-
Step 600
600
#6952EF
oklch(55.6% 0.224 283)
-
Step 700
700
#5841D0
oklch(49.1% 0.208 282.9)
-
Step 800
800
#4837A8
oklch(42.8% 0.172 283.2)
-
Step 900
900
#3B3285
oklch(37.8% 0.134 282.8)
-
Step 950
950 (this color)
#231F4F
oklch(27.4% 0.085 283)
#231F4F 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) | #032751 | 0.041 |
| Deuteranopia (no green cones) | #00244E | 0.043 |
| Tritanopia (no blue cones) | #122A33 | 0.073 |
| Achromatopsia (no color) | #262626 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231F4F
#231F4F
oklch(27.4% 0.085 283)
- #2D2800
#2D2800
oklch(27.4% 0.057 102.2)
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 #231F4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.051
- Marine #042E60 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.057
- Midnight Blue #191970 ΔE 0.063
- Dark #1B2431 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.066
- Dark Purple #35063E ΔE 0.070
Use #231F4F 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.