#281F51
Closest named color: Oxford Blue (#1B263B). oklch(28% 0.088 287.6), rgb(40, 31, 81).
Aa
White text reads best on this color (14.94:1).
About this color
#281F51 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.088 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.054 away. White text reads best on it, at 14.94:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.40:1 |
| White text | 14.94:1 |
Values
| HEX | #281F51 |
| RGB | rgb(40, 31, 81) |
| HSL | hsl(251, 45%, 22%) |
| OKLCH | oklch(28% 0.088 287.6) |
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 #281F51 | 14.94:1 | AAA | Lc -104.5 | Preferred for body text |
| Black text on #281F51 | 1.40:1 | Fails | Lc 0.0 | Not readable |
| #281F51 text on white | 14.94:1 | AAA | Lc 101.6 | Preferred for body text |
| #281F51 text on black | 1.40:1 | 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E8E7FE
oklch(93.6% 0.031 287.8)
-
Step 200
200
#D6D4FE
oklch(88.5% 0.058 287.3)
-
Step 300
300
#BCB7FF
oklch(80.9% 0.101 287.1)
-
Step 400
400
#9C8DFF
oklch(70.6% 0.163 287.5)
-
Step 500
500
#876BFF
oklch(63.1% 0.211 287.5)
-
Step 600
600
#744BEF
oklch(55.6% 0.231 287.9)
-
Step 700
700
#623BD0
oklch(49.2% 0.214 287.8)
-
Step 800
800
#4F32A8
oklch(42.6% 0.178 287.6)
-
Step 900
900
#412E85
oklch(37.6% 0.139 287.9)
-
Step 950
950 (this color)
#281F51
oklch(28% 0.088 287.6)
#281F51 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) | #032853 | 0.049 |
| Deuteranopia (no green cones) | #032650 | 0.049 |
| Tritanopia (no blue cones) | #1B2A34 | 0.073 |
| Achromatopsia (no color) | #272727 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #281F51
#281F51
oklch(28% 0.088 287.6)
- #2C2B00
#2C2B00
oklch(28.1% 0.061 108.4)
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 #281F51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.054
- Dark Indigo #1F0954 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.056
- Marine #042E60 ΔE 0.058
- Midnight Blue #191970 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.065
- Dark Purple #35063E ΔE 0.067
- Dark #1B2431 ΔE 0.069
Use #281F51 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.