#283D61
Closest named color: Prussian Blue (#1D3557). oklch(36.1% 0.068 260.7), rgb(40, 61, 97).
Aa
White text reads best on this color (10.87:1).
About this color
#283D61 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 0.033 away. White text reads best on it, at 10.87:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.93:1 |
| White text | 10.87:1 |
Values
| HEX | #283D61 |
| RGB | rgb(40, 61, 97) |
| HSL | hsl(218, 42%, 27%) |
| OKLCH | oklch(36.1% 0.068 260.7) |
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 #283D61 | 10.87:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #283D61 | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #283D61 text on white | 10.87:1 | AAA | Lc 95.1 | Preferred for body text |
| #283D61 text on black | 1.93:1 | Fails | Lc -7.6 | 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
#AEC2E2
oklch(81% 0.05 259.8)
-
Step 400
400
#83A1D4
oklch(70.6% 0.082 260.8)
-
Step 500
500
#6489C9
oklch(63% 0.106 260.9)
-
Step 600
600
#4B72B5
oklch(55.5% 0.114 260.6)
-
Step 700
700
#3D609C
oklch(49.2% 0.105 260.6)
-
Step 800
800
#324E7F
oklch(42.6% 0.089 260.9)
-
Step 900
900 (this color)
#283D61
oklch(36.1% 0.068 260.7)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#283D61 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) | #2E4062 | 0.013 |
| Deuteranopia (no green cones) | #273A60 | 0.010 |
| Tritanopia (no blue cones) | #06454A | 0.061 |
| Achromatopsia (no color) | #3D3D3D | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283D61
#283D61
oklch(36.1% 0.068 260.7)
- #503909
#503909
oklch(36.2% 0.069 80.7)
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 #283D61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.038
- Marine Blue #01386A ΔE 0.041
- Charcoal #264653 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.047
- Midnight Green #073B4C ΔE 0.050
- Onyx #343A40 ΔE 0.057
Use #283D61 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.