#10528F
Closest named color: Dusk Blue (#26538D). oklch(43.4% 0.118 251.7), rgb(16, 82, 143).
Aa
White text reads best on this color (7.99:1).
About this color
#10528F is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.118 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.015 away. White text reads best on it, at 7.99:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #10528F |
| RGB | rgb(16, 82, 143) |
| HSL | hsl(209, 80%, 31%) |
| OKLCH | oklch(43.4% 0.118 251.7) |
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 #10528F | 7.99:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #10528F | 2.62:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #10528F text on white | 7.99:1 | AAA | Lc 87.2 | Fine for body text |
| #10528F text on black | 2.62:1 | Fails | Lc -14.9 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C7DBF2
oklch(88.4% 0.038 251.9)
-
Step 300
300
#A0C4ED
oklch(80.8% 0.07 252)
-
Step 400
400
#6BA5E4
oklch(70.8% 0.111 251.5)
-
Step 500
500
#408DDC
oklch(63.2% 0.141 251.5)
-
Step 600
600
#1875C9
oklch(55.6% 0.153 251.5)
-
Step 700
700
#0562AE
oklch(49.2% 0.143 251.5)
-
Step 800
800 (this color)
#10528F
oklch(43.4% 0.118 251.7)
-
Step 900
900
#154371
oklch(37.7% 0.093 251.7)
-
Step 950
950
#0E2842
oklch(27.1% 0.058 250.8)
#10528F 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) | #335791 | 0.033 |
| Deuteranopia (no green cones) | #1C4B8E | 0.020 |
| Tritanopia (no blue cones) | #006169 | 0.088 |
| Achromatopsia (no color) | #515151 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10528F
#10528F
oklch(43.4% 0.118 251.7)
- #704700
#704700
oklch(43.5% 0.093 72)
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 #10528F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.015
- Light Navy #155084 ΔE 0.018
- Deep Sea Blue #015482 ΔE 0.024
- Cobalt #1E488F ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.054
- Peacock Blue #016795 ΔE 0.061
Use #10528F 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.