#283C60
Closest named color: Prussian Blue (#1D3557). oklch(35.8% 0.068 261.5), rgb(40, 60, 96).
Aa
White text reads best on this color (11.02:1).
About this color
#283C60 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.068 and its hue 261°. 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 11.02:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #283C60 |
| RGB | rgb(40, 60, 96) |
| HSL | hsl(219, 41%, 27%) |
| OKLCH | oklch(35.8% 0.068 261.5) |
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 #283C60 | 11.02:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #283C60 | 1.90:1 | Fails | Lc 8.5 | Not readable |
| #283C60 text on white | 11.02:1 | AAA | Lc 95.4 | Preferred for body text |
| #283C60 text on black | 1.90:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC1E2
oklch(80.8% 0.051 262.6)
-
Step 400
400
#84A1D4
oklch(70.6% 0.082 261.5)
-
Step 500
500
#6689C9
oklch(63.1% 0.105 261.9)
-
Step 600
600
#4D72B5
oklch(55.6% 0.113 261.5)
-
Step 700
700
#3E5F9C
oklch(49% 0.106 261.8)
-
Step 800
800
#334E7F
oklch(42.7% 0.088 261.5)
-
Step 900
900 (this color)
#283C60
oklch(35.8% 0.068 261.5)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#283C60 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) | #2E3F61 | 0.013 |
| Deuteranopia (no green cones) | #273A5F | 0.007 |
| Tritanopia (no blue cones) | #074449 | 0.061 |
| Achromatopsia (no color) | #3C3C3C | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283C60
#283C60
oklch(35.8% 0.068 261.5)
- #4E3809
#4E3809
oklch(35.7% 0.067 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 #283C60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.036
- Marine Blue #01386A ΔE 0.040
- Charcoal #264653 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.049
- Midnight Green #073B4C ΔE 0.049
- Onyx #343A40 ΔE 0.056
Use #283C60 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.