#15506E
Closest named color: Deep Sea Blue (#015482). oklch(40.9% 0.077 235.8), rgb(21, 80, 110).
Aa
White text reads best on this color (8.73:1).
About this color
#15506E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.077 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.033 away. White text reads best on it, at 8.73:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #15506E |
| RGB | rgb(21, 80, 110) |
| HSL | hsl(200, 68%, 26%) |
| OKLCH | oklch(40.9% 0.077 235.8) |
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 #15506E | 8.73:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #15506E | 2.40:1 | Fails | Lc 14.4 | Not readable |
| #15506E text on white | 8.73:1 | AAA | Lc 89.6 | Fine for body text |
| #15506E text on black | 2.40:1 | Fails | Lc -12.6 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A6C6DA
oklch(81% 0.045 235.5)
-
Step 400
400
#74A8C8
oklch(70.7% 0.072 236.2)
-
Step 500
500
#4D92BA
oklch(63.1% 0.092 236.2)
-
Step 600
600
#2C7CA6
oklch(55.7% 0.1 235.8)
-
Step 700
700
#1D688E
oklch(49.1% 0.093 235.8)
-
Step 800
800 (this color)
#15506E
oklch(40.9% 0.077 235.8)
-
Step 900
900
#1D465D
oklch(37.6% 0.06 236.1)
-
Step 950
950
#122936
oklch(26.9% 0.038 235.3)
#15506E 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) | #41506F | 0.045 |
| Deuteranopia (no green cones) | #36476E | 0.039 |
| Tritanopia (no blue cones) | #00585A | 0.050 |
| Achromatopsia (no color) | #4B4B4B | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15506E
#15506E
oklch(40.9% 0.077 235.8)
- #693E1D
#693E1D
oklch(40.9% 0.076 55.9)
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 #15506E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.033
- Light Navy #155084 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.039
- Deep Teal #00555A ΔE 0.044
- Charcoal #264653 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.050
- Petrol #005F6A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.054
Use #15506E 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.