#283B62
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.072 263.5), rgb(40, 59, 98).
Aa
White text reads best on this color (11.09:1).
About this color
#283B62 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.072 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.030 away. White text reads best on it, at 11.09:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.89:1 |
| White text | 11.09:1 |
Values
| HEX | #283B62 |
| RGB | rgb(40, 59, 98) |
| HSL | hsl(220, 42%, 27%) |
| OKLCH | oklch(35.6% 0.072 263.5) |
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 #283B62 | 11.09:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #283B62 | 1.89:1 | Fails | Lc 8.4 | Not readable |
| #283B62 text on white | 11.09:1 | AAA | Lc 95.5 | Preferred for body text |
| #283B62 text on black | 1.89:1 | 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
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAEE
oklch(88.6% 0.03 262.5)
-
Step 300
300
#AFC1E5
oklch(80.9% 0.055 264.2)
-
Step 400
400
#84A0D7
oklch(70.6% 0.087 263.5)
-
Step 500
500
#6688CD
oklch(63.1% 0.111 263.5)
-
Step 600
600
#4E71BA
oklch(55.7% 0.121 263.6)
-
Step 700
700
#3F5EA0
oklch(49.1% 0.112 263.8)
-
Step 800
800
#344D82
oklch(42.7% 0.094 263.8)
-
Step 900
900 (this color)
#283B62
oklch(35.6% 0.072 263.5)
-
Step 950
950
#1B263D
oklch(27% 0.046 264.1)
#283B62 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) | #2B3F64 | 0.014 |
| Deuteranopia (no green cones) | #243961 | 0.009 |
| Tritanopia (no blue cones) | #054449 | 0.066 |
| Achromatopsia (no color) | #3C3C3C | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283B62
#283B62
oklch(35.6% 0.072 263.5)
- #4E3801
#4E3801
oklch(35.6% 0.072 83.6)
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 #283B62, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.030
- Marine Blue #01386A ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.040
- Twilight Blue #0A437A ΔE 0.047
- Charcoal #264653 ΔE 0.050
- Midnight Green #073B4C ΔE 0.052
- Marine #042E60 ΔE 0.057
Use #283B62 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.