#283A60
Closest named color: Prussian Blue (#1D3557). oklch(35.3% 0.071 263.9), rgb(40, 58, 96).
Aa
White text reads best on this color (11.26:1).
About this color
#283A60 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.071 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.026 away. White text reads best on it, at 11.26:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.26:1 |
Values
| HEX | #283A60 |
| RGB | rgb(40, 58, 96) |
| HSL | hsl(221, 41%, 27%) |
| OKLCH | oklch(35.3% 0.071 263.9) |
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 #283A60 | 11.26:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #283A60 | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #283A60 text on white | 11.26:1 | AAA | Lc 95.9 | Preferred for body text |
| #283A60 text on black | 1.86:1 | 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 900.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFD9ED
oklch(88.4% 0.03 264.4)
-
Step 300
300
#AFC1E4
oklch(80.9% 0.053 263.7)
-
Step 400
400
#86A0D6
oklch(70.6% 0.085 264.4)
-
Step 500
500
#6888CB
oklch(63.1% 0.108 264.1)
-
Step 600
600
#4F71B8
oklch(55.6% 0.118 263.7)
-
Step 700
700
#405E9E
oklch(49% 0.109 263.9)
-
Step 800
800
#354D80
oklch(42.6% 0.09 263.9)
-
Step 900
900 (this color)
#283A60
oklch(35.3% 0.071 263.9)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#283A60 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) | #2B3D62 | 0.011 |
| Deuteranopia (no green cones) | #24385F | 0.009 |
| Tritanopia (no blue cones) | #084248 | 0.063 |
| Achromatopsia (no color) | #3B3B3B | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283A60
#283A60
oklch(35.3% 0.071 263.9)
- #4C3703
#4C3703
oklch(35.1% 0.07 83.8)
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 #283A60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.038
- Marine Blue #01386A ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.042
- Midnight Green #073B4C ΔE 0.050
- Charcoal #264653 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.050
- Marine #042E60 ΔE 0.055
Use #283A60 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.