#15527E
Closest named color: Deep Sea Blue (#015482). oklch(42.4% 0.095 245.1), rgb(21, 82, 126).
Aa
White text reads best on this color (8.26:1).
About this color
#15527E is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.095 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.010 away. White text reads best on it, at 8.26:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #15527E |
| RGB | rgb(21, 82, 126) |
| HSL | hsl(205, 71%, 29%) |
| OKLCH | oklch(42.4% 0.095 245.1) |
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 #15527E | 8.26:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #15527E | 2.54:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #15527E text on white | 8.26:1 | AAA | Lc 88.2 | Fine for body text |
| #15527E text on black | 2.54:1 | Fails | Lc -14.0 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A4C5E3
oklch(80.9% 0.055 246)
-
Step 400
400
#71A7D4
oklch(70.8% 0.087 244.6)
-
Step 500
500
#4890C9
oklch(63.2% 0.112 244.9)
-
Step 600
600
#2579B6
oklch(55.7% 0.123 245.1)
-
Step 700
700
#16659D
oklch(49% 0.115 245.6)
-
Step 800
800 (this color)
#15527E
oklch(42.4% 0.095 245.1)
-
Step 900
900
#1A4566
oklch(37.7% 0.074 244.9)
-
Step 950
950
#11293C
oklch(27.2% 0.047 244.6)
#15527E 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) | #3D5480 | 0.039 |
| Deuteranopia (no green cones) | #2E4A7D | 0.029 |
| Tritanopia (no blue cones) | #005D62 | 0.067 |
| Achromatopsia (no color) | #4E4E4E | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15527E
#15527E
oklch(42.4% 0.095 245.1)
- #714101
#714101
oklch(42.4% 0.095 64.5)
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 #15527E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.010
- Light Navy #155084 ΔE 0.013
- Dusk Blue #26538D ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.036
- Cobalt #1E488F ΔE 0.044
- Twilight Blue #0A437A ΔE 0.047
- YInMn Blue #415A77 ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.056
Use #15527E 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.