#283676
Closest named color: Marine Blue (#01386A). oklch(35.9% 0.111 270.6), rgb(40, 54, 118).
Aa
White text reads best on this color (11.17:1).
About this color
#283676 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.111 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.040 away. White text reads best on it, at 11.17:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #283676 |
| RGB | rgb(40, 54, 118) |
| HSL | hsl(229, 49%, 31%) |
| OKLCH | oklch(35.9% 0.111 270.6) |
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 #283676 | 11.17:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #283676 | 1.87:1 | Fails | Lc 8.4 | Not readable |
| #283676 text on white | 11.17:1 | AAA | Lc 95.5 | Preferred for body text |
| #283676 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBEF7
oklch(80.8% 0.083 270.9)
-
Step 400
400
#829BF3
oklch(70.7% 0.132 270.7)
-
Step 500
500
#647FEF
oklch(63.1% 0.17 270.7)
-
Step 600
600
#4D65DD
oklch(55.5% 0.184 270.7)
-
Step 700
700
#3F53C0
oklch(49.1% 0.172 270.9)
-
Step 800
800
#33459B
oklch(42.7% 0.141 270.4)
-
Step 900
900 (this color)
#283676
oklch(35.9% 0.111 270.6)
-
Step 950
950
#1A2348
oklch(27% 0.07 270.8)
#283676 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) | #0F3F78 | 0.031 |
| Deuteranopia (no green cones) | #003875 | 0.032 |
| Tritanopia (no blue cones) | #004550 | 0.094 |
| Achromatopsia (no color) | #3B3B3B | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283676
#283676
oklch(35.9% 0.111 270.6)
- #4B3B00
#4B3B00
oklch(35.9% 0.073 91.6)
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 #283676, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.040
- Twilight Blue #0A437A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.057
- Marine #042E60 ΔE 0.060
- Cobalt #1E488F ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.074
- Light Navy #155084 ΔE 0.075
Use #283676 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.