#283E68
Closest named color: Twilight Blue (#0A437A). oklch(36.8% 0.078 262.3), rgb(40, 62, 104).
Aa
White text reads best on this color (10.61:1).
About this color
#283E68 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.078 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.037 away. White text reads best on it, at 10.61:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #283E68 |
| RGB | rgb(40, 62, 104) |
| HSL | hsl(219, 44%, 28%) |
| OKLCH | oklch(36.8% 0.078 262.3) |
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 #283E68 | 10.61:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #283E68 | 1.97:1 | Fails | Lc 9.5 | Not readable |
| #283E68 text on white | 10.61:1 | AAA | Lc 94.5 | Preferred for body text |
| #283E68 text on black | 1.97:1 | Fails | Lc -8.1 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ACC1E7
oklch(80.8% 0.059 262.3)
-
Step 400
400
#81A1DB
oklch(70.8% 0.093 262)
-
Step 500
500
#6188D2
oklch(63.1% 0.12 262.3)
-
Step 600
600
#4871BF
oklch(55.7% 0.13 262.1)
-
Step 700
700
#3A5EA5
oklch(49.1% 0.121 262.5)
-
Step 800
800
#304D85
oklch(42.7% 0.1 262.3)
-
Step 900
900 (this color)
#283E68
oklch(36.8% 0.078 262.3)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#283E68 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) | #2C426A | 0.014 |
| Deuteranopia (no green cones) | #243C67 | 0.008 |
| Tritanopia (no blue cones) | #00474E | 0.068 |
| Achromatopsia (no color) | #3F3F3F | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283E68
#283E68
oklch(36.8% 0.078 262.3)
- #533A00
#533A00
oklch(36.7% 0.076 81.4)
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 #283E68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.038
- Marine Blue #01386A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.049
- Charcoal #264653 ΔE 0.050
- Midnight Green #073B4C ΔE 0.060
- Light Navy #155084 ΔE 0.064
Use #283E68 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.