#023561
Closest named color: Marine Blue (#01386A). oklch(32.5% 0.092 250.9), rgb(2, 53, 97).
Aa
White text reads best on this color (12.46:1).
About this color
#023561 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.092 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.017 away. White text reads best on it, at 12.46:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.68:1 |
| White text | 12.46:1 |
Values
| HEX | #023561 |
| RGB | rgb(2, 53, 97) |
| HSL | hsl(208, 96%, 19%) |
| OKLCH | oklch(32.5% 0.092 250.9) |
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 #023561 | 12.46:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #023561 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #023561 text on white | 12.46:1 | AAA | Lc 97.8 | Preferred for body text |
| #023561 text on black | 1.68:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#A0C4EC
oklch(80.8% 0.069 251.4)
-
Step 400
400
#6AA5E3
oklch(70.7% 0.11 250.8)
-
Step 500
500
#3E8DDB
oklch(63.1% 0.141 250.8)
-
Step 600
600
#1375C9
oklch(55.5% 0.154 251.1)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#09508D
oklch(42.6% 0.119 251.2)
-
Step 900
900 (this color)
#023561
oklch(32.5% 0.092 250.9)
-
Step 950
950
#0E2842
oklch(27.1% 0.058 250.8)
#023561 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) | #1E3863 | 0.025 |
| Deuteranopia (no green cones) | #0C3060 | 0.015 |
| Tritanopia (no blue cones) | #004046 | 0.068 |
| Achromatopsia (no color) | #343434 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023561
#023561
oklch(32.5% 0.092 250.9)
- #4A2D00
#4A2D00
oklch(32.5% 0.07 71.4)
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 #023561, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.017
- Marine #042E60 ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.026
- Midnight Green #073B4C ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.050
- Twilight Blue #0A437A ΔE 0.058
- Gunmetal #293241 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.065
Use #023561 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.