#10558E
Closest named color: Dusk Blue (#26538D). oklch(44% 0.114 249.4), rgb(16, 85, 142).
Aa
White text reads best on this color (7.74:1).
About this color
#10558E is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.114 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.014 away. White text reads best on it, at 7.74:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.71:1 |
| White text | 7.74:1 |
Values
| HEX | #10558E |
| RGB | rgb(16, 85, 142) |
| HSL | hsl(207, 80%, 31%) |
| OKLCH | oklch(44% 0.114 249.4) |
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 #10558E | 7.74:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #10558E | 2.71:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #10558E text on white | 7.74:1 | AAA | Lc 86.4 | Fine for body text |
| #10558E text on black | 2.71:1 | Fails | Lc -15.6 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A0C5EA
oklch(80.9% 0.066 248.6)
-
Step 400
400
#6BA6E0
oklch(70.8% 0.105 249.1)
-
Step 500
500
#3E8ED8
oklch(63.2% 0.136 249.4)
-
Step 600
600
#1376C5
oklch(55.5% 0.148 249.5)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800 (this color)
#10558E
oklch(44% 0.114 249.4)
-
Step 900
900
#14446E
oklch(37.8% 0.088 249)
-
Step 950
950
#0E2841
oklch(27.1% 0.057 249.9)
#10558E 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) | #395990 | 0.037 |
| Deuteranopia (no green cones) | #254E8D | 0.022 |
| Tritanopia (no blue cones) | #00636A | 0.083 |
| Achromatopsia (no color) | #535353 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10558E
#10558E
oklch(44% 0.114 249.4)
- #744700
#744700
oklch(44% 0.096 69.1)
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 #10558E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.014
- Light Navy #155084 ΔE 0.020
- Deep Sea Blue #015482 ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.030
- Cobalt #1E488F ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.042
- Peacock Blue #016795 ΔE 0.053
- Denim #3B638C ΔE 0.059
Use #10558E 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.