#283967
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.083 266.9), rgb(40, 57, 103).
Aa
White text reads best on this color (11.22:1).
About this color
#283967 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.083 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.034 away. White text reads best on it, at 11.22:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #283967 |
| RGB | rgb(40, 57, 103) |
| HSL | hsl(224, 44%, 28%) |
| OKLCH | oklch(35.5% 0.083 266.9) |
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 #283967 | 11.22:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #283967 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #283967 text on white | 11.22:1 | AAA | Lc 95.8 | Preferred for body text |
| #283967 text on black | 1.87:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#AEC0EA
oklch(80.8% 0.063 266.8)
-
Step 400
400
#849FDF
oklch(70.7% 0.099 266.4)
-
Step 500
500
#6686D6
oklch(63.2% 0.126 266.4)
-
Step 600
600
#4E6EC4
oklch(55.7% 0.138 266.6)
-
Step 700
700
#3F5BA9
oklch(49% 0.129 266.8)
-
Step 800
800
#344B89
oklch(42.7% 0.107 266.6)
-
Step 900
900 (this color)
#283967
oklch(35.5% 0.083 266.9)
-
Step 950
950
#1B2540
oklch(27% 0.052 267.5)
#283967 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) | #253E69 | 0.015 |
| Deuteranopia (no green cones) | #1D3866 | 0.014 |
| Tritanopia (no blue cones) | #00434B | 0.073 |
| Achromatopsia (no color) | #3B3B3B | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283967
#283967
oklch(35.5% 0.083 266.9)
- #4C3900
#4C3900
oklch(35.6% 0.073 87.6)
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 #283967, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.051
- Marine #042E60 ΔE 0.053
- Midnight Green #073B4C ΔE 0.060
- Charcoal #264653 ΔE 0.061
Use #283967 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.