#0A455E
Closest named color: Dark Grey Blue (#29465B). oklch(36.8% 0.07 232.6), rgb(10, 69, 94).
Aa
White text reads best on this color (10.36:1).
About this color
#0A455E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.070 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.026 away. White text reads best on it, at 10.36:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.02:1 |
| White text | 10.36:1 |
Values
| HEX | #0A455E |
| RGB | rgb(10, 69, 94) |
| HSL | hsl(198, 81%, 20%) |
| OKLCH | oklch(36.8% 0.07 232.6) |
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 #0A455E | 10.36:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #0A455E | 2.02:1 | Fails | Lc 10.2 | Not readable |
| #0A455E text on white | 10.36:1 | AAA | Lc 93.7 | Preferred for body text |
| #0A455E text on black | 2.02:1 | Fails | Lc -8.8 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#9FC7DD
oklch(80.8% 0.053 232.3)
-
Step 400
400
#68AACD
oklch(70.7% 0.085 232.9)
-
Step 500
500
#3794C0
oklch(63.1% 0.108 232.9)
-
Step 600
600
#007EAB
oklch(55.7% 0.114 232.4)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900 (this color)
#0A455E
oklch(36.8% 0.07 232.6)
-
Step 950
950
#0B2A39
oklch(27% 0.045 233.1)
#0A455E 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) | #38445F | 0.045 |
| Deuteranopia (no green cones) | #2E3D5E | 0.038 |
| Tritanopia (no blue cones) | #004C4D | 0.043 |
| Achromatopsia (no color) | #404040 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A455E
#0A455E
oklch(36.8% 0.07 232.6)
- #5C3418
#5C3418
oklch(36.9% 0.071 53.5)
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 #0A455E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.026
- Charcoal #264653 ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.038
- Midnight Green #073B4C ΔE 0.041
- Dark Teal #014D4E ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Marine Blue #01386A ΔE 0.051
Use #0A455E 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.