#0A3255
Closest named color: Prussian Blue (#1D3557). oklch(31% 0.076 249.6), rgb(10, 50, 85).
Aa
White text reads best on this color (13.12:1).
About this color
#0A3255 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.076 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 13.12:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.60:1 |
| White text | 13.12:1 |
Values
| HEX | #0A3255 |
| RGB | rgb(10, 50, 85) |
| HSL | hsl(208, 79%, 19%) |
| OKLCH | oklch(31% 0.076 249.6) |
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 #0A3255 | 13.12:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #0A3255 | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #0A3255 text on white | 13.12:1 | AAA | Lc 99.1 | Preferred for body text |
| #0A3255 text on black | 1.60:1 | 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 950.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DDECFB
oklch(93.6% 0.026 248.1)
-
Step 200
200
#C1DDFA
oklch(88.6% 0.05 249.3)
-
Step 300
300
#93C6F9
oklch(81% 0.09 249)
-
Step 400
400
#51A6F6
oklch(70.8% 0.144 249.3)
-
Step 500
500
#008DEE
oklch(63.2% 0.176 249.3)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004377
oklch(37.7% 0.106 249.9)
-
Step 950
950 (this color)
#0A3255
oklch(31% 0.076 249.6)
#0A3255 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) | #213456 | 0.024 |
| Deuteranopia (no green cones) | #162D54 | 0.017 |
| Tritanopia (no blue cones) | #003A3F | 0.055 |
| Achromatopsia (no color) | #303030 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A3255
#0A3255
oklch(31% 0.076 249.6)
- #462900
#462900
oklch(31% 0.068 69.2)
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 #0A3255, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Marine #042E60 ΔE 0.025
- Midnight Green #073B4C ΔE 0.038
- Marine Blue #01386A ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.043
- Gunmetal #293241 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.055
Use #0A3255 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.