#15527C
Closest named color: Deep Sea Blue (#015482). oklch(42.3% 0.092 244), rgb(21, 82, 124).
Aa
White text reads best on this color (8.30:1).
About this color
#15527C is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.092 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.012 away. White text reads best on it, at 8.30:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.52:1 |
| White text | 8.30:1 |
Values
| HEX | #15527C |
| RGB | rgb(21, 82, 124) |
| HSL | hsl(204, 71%, 28%) |
| OKLCH | oklch(42.3% 0.092 244) |
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 #15527C | 8.30:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #15527C | 2.52:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #15527C text on white | 8.30:1 | AAA | Lc 88.3 | Fine for body text |
| #15527C text on black | 2.52:1 | Fails | Lc -13.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A4C5E1
oklch(80.9% 0.053 244.1)
-
Step 400
400
#71A7D3
oklch(70.8% 0.086 244)
-
Step 500
500
#4890C7
oklch(63.1% 0.11 243.9)
-
Step 600
600
#2579B4
oklch(55.5% 0.12 244.2)
-
Step 700
700
#16669B
oklch(49.2% 0.112 244)
-
Step 800
800 (this color)
#15527C
oklch(42.3% 0.092 244)
-
Step 900
900
#1B4565
oklch(37.7% 0.072 244.5)
-
Step 950
950
#11293B
oklch(27.1% 0.045 243.2)
#15527C 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) | #3E537E | 0.040 |
| Deuteranopia (no green cones) | #304A7B | 0.030 |
| Tritanopia (no blue cones) | #005C61 | 0.063 |
| Achromatopsia (no color) | #4E4E4E | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15527C
#15527C
oklch(42.3% 0.092 244)
- #704106
#704106
oklch(42.3% 0.092 64)
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 #15527C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.012
- Light Navy #155084 ΔE 0.016
- Dusk Blue #26538D ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.038
- Cobalt #1E488F ΔE 0.047
- Twilight Blue #0A437A ΔE 0.047
- YInMn Blue #415A77 ΔE 0.053
- Petrol #005F6A ΔE 0.058
Use #15527C 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.