#155271
Closest named color: Deep Sea Blue (#015482). oklch(41.6% 0.079 235.9), rgb(21, 82, 113).
Aa
White text reads best on this color (8.47:1).
About this color
#155271 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.079 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.028 away. White text reads best on it, at 8.47:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.47:1 |
| White text | 8.47:1 |
Values
| HEX | #155271 |
| RGB | rgb(21, 82, 113) |
| HSL | hsl(200, 69%, 26%) |
| OKLCH | oklch(41.6% 0.079 235.9) |
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 #155271 | 8.47:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #155271 | 2.47:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #155271 text on white | 8.47:1 | AAA | Lc 88.9 | Fine for body text |
| #155271 text on black | 2.47:1 | Fails | Lc -13.3 | 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
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A5C6DB
oklch(80.9% 0.046 236.1)
-
Step 400
400
#73A8C9
oklch(70.7% 0.074 236.6)
-
Step 500
500
#4B92BB
oklch(63.1% 0.094 236.3)
-
Step 600
600
#297CA7
oklch(55.7% 0.102 235.8)
-
Step 700
700
#1A688F
oklch(49.1% 0.095 236)
-
Step 800
800 (this color)
#155271
oklch(41.6% 0.079 235.9)
-
Step 900
900
#1C465E
oklch(37.6% 0.062 236.8)
-
Step 950
950
#122937
oklch(26.9% 0.039 237.4)
#155271 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) | #435272 | 0.047 |
| Deuteranopia (no green cones) | #374970 | 0.039 |
| Tritanopia (no blue cones) | #005A5D | 0.049 |
| Achromatopsia (no color) | #4D4D4D | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155271
#155271
oklch(41.6% 0.079 235.9)
- #6C3F1D
#6C3F1D
oklch(41.5% 0.079 55.4)
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 #155271, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.028
- Light Navy #155084 ΔE 0.034
- Deep Teal #00555A ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.046
- Petrol #005F6A ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
- YInMn Blue #415A77 ΔE 0.053
Use #155271 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.