#283151
Closest named color: Prussian Blue (#1D3557). oklch(32.1% 0.059 270.9), rgb(40, 49, 81).
Aa
White text reads best on this color (12.73:1).
About this color
#283151 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.059 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.019 away. White text reads best on it, at 12.73:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.73:1 |
Values
| HEX | #283151 |
| RGB | rgb(40, 49, 81) |
| HSL | hsl(227, 34%, 24%) |
| OKLCH | oklch(32.1% 0.059 270.9) |
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 #283151 | 12.73:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #283151 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #283151 text on white | 12.73:1 | AAA | Lc 98.8 | Preferred for body text |
| #283151 text on black | 1.64:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#CFD8F3
oklch(88.4% 0.038 271)
-
Step 300
300
#B0BFEE
oklch(80.9% 0.069 271)
-
Step 400
400
#879CE6
oklch(70.6% 0.111 271.2)
-
Step 500
500
#6A82DF
oklch(63.1% 0.142 270.9)
-
Step 600
600
#536ACC
oklch(55.6% 0.153 270.8)
-
Step 700
700
#4458B1
oklch(49.2% 0.143 270.8)
-
Step 800
800
#38488F
oklch(42.7% 0.118 271.1)
-
Step 900
900
#303D72
oklch(37.7% 0.092 271.1)
-
Step 950
950 (this color)
#283151
oklch(32.1% 0.059 270.9)
#283151 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) | #253452 | 0.010 |
| Deuteranopia (no green cones) | #213150 | 0.010 |
| Tritanopia (no blue cones) | #19383D | 0.053 |
| Achromatopsia (no color) | #323232 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283151
#283151
oklch(32.1% 0.059 270.9)
- #3E3209
#3E3209
oklch(32.2% 0.058 91.9)
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 #283151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Space Cadet #2B2D42 ΔE 0.027
- Gunmetal #293241 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.036
- Midnight Green #073B4C ΔE 0.046
- Marine #042E60 ΔE 0.047
- Onyx #343A40 ΔE 0.052
- Marine Blue #01386A ΔE 0.053
Use #283151 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.