#155681
Closest named color: Deep Sea Blue (#015482). oklch(43.6% 0.095 243.2), rgb(21, 86, 129).
Aa
White text reads best on this color (7.83:1).
About this color
#155681 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.095 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.011 away. White text reads best on it, at 7.83:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.67:1 |
| White text | 7.83:1 |
Values
| HEX | #155681 |
| RGB | rgb(21, 86, 129) |
| HSL | hsl(204, 72%, 29%) |
| OKLCH | oklch(43.6% 0.095 243.2) |
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 #155681 | 7.83:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #155681 | 2.67:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #155681 text on white | 7.83:1 | AAA | Lc 86.8 | Fine for body text |
| #155681 text on black | 2.67:1 | Fails | Lc -15.3 | Dividers and decoration only |
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
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C5E2
oklch(80.8% 0.055 244.3)
-
Step 400
400
#6FA7D4
oklch(70.7% 0.089 243.7)
-
Step 500
500
#4490C8
oklch(63% 0.113 243.3)
-
Step 600
600
#1E7AB5
oklch(55.7% 0.123 242.9)
-
Step 700
700
#0D669C
oklch(49.1% 0.115 243.3)
-
Step 800
800 (this color)
#155681
oklch(43.6% 0.095 243.2)
-
Step 900
900
#184565
oklch(37.6% 0.073 243.3)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#155681 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) | #425783 | 0.043 |
| Deuteranopia (no green cones) | #334D80 | 0.033 |
| Tritanopia (no blue cones) | #006165 | 0.067 |
| Achromatopsia (no color) | #525252 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155681
#155681
oklch(43.6% 0.095 243.2)
- #754409
#754409
oklch(43.6% 0.095 63.3)
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 #155681, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.011
- Light Navy #155084 ΔE 0.020
- Dusk Blue #26538D ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.027
- YInMn Blue #415A77 ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.048
- Cobalt #1E488F ΔE 0.051
- Peacock Blue #016795 ΔE 0.054
Use #155681 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.