#15528B
Closest named color: Light Navy (#155084). oklch(43.2% 0.112 251.2), rgb(21, 82, 139).
Aa
White text reads best on this color (8.04:1).
About this color
#15528B is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.112 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.012 away. White text reads best on it, at 8.04:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.61:1 |
| White text | 8.04:1 |
Values
| HEX | #15528B |
| RGB | rgb(21, 82, 139) |
| HSL | hsl(209, 74%, 31%) |
| OKLCH | oklch(43.2% 0.112 251.2) |
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 #15528B | 8.04:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #15528B | 2.61:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #15528B text on white | 8.04:1 | AAA | Lc 87.4 | Fine for body text |
| #15528B text on black | 2.61:1 | Fails | Lc -14.7 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6EA5E0
oklch(70.8% 0.105 251.1)
-
Step 500
500
#448DD7
oklch(63.1% 0.134 251)
-
Step 600
600
#2076C4
oklch(55.7% 0.144 250.7)
-
Step 700
700
#1162AA
oklch(49.1% 0.136 251.4)
-
Step 800
800 (this color)
#15528B
oklch(43.2% 0.112 251.2)
-
Step 900
900
#18436E
oklch(37.6% 0.088 251.3)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#15528B 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) | #36568D | 0.032 |
| Deuteranopia (no green cones) | #234B8A | 0.021 |
| Tritanopia (no blue cones) | #006067 | 0.084 |
| Achromatopsia (no color) | #505050 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15528B
#15528B
oklch(43.2% 0.112 251.2)
- #704600
#704600
oklch(43.2% 0.093 70.8)
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 #15528B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.012
- Dusk Blue #26538D ΔE 0.014
- Deep Sea Blue #015482 ΔE 0.019
- Cobalt #1E488F ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.047
- Twilight Blue #0A437A ΔE 0.051
- Twilight #4E518B ΔE 0.060
Use #15528B 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.