#155B85
Closest named color: Light Navy Blue (#2E5A88). oklch(45.1% 0.095 241), rgb(21, 91, 133).
Aa
White text reads best on this color (7.32:1).
About this color
#155B85 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.095 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.019 away. White text reads best on it, at 7.32:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.86:1 |
| White text | 7.32:1 |
Values
| HEX | #155B85 |
| RGB | rgb(21, 91, 133) |
| HSL | hsl(203, 73%, 30%) |
| OKLCH | oklch(45.1% 0.095 241) |
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 #155B85 | 7.32:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #155B85 | 2.86:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #155B85 text on white | 7.32:1 | AAA | Lc 85.1 | Fine for body text |
| #155B85 text on black | 2.86:1 | Fails | Lc -16.9 | 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
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E2
oklch(80.9% 0.056 241)
-
Step 400
400
#6CA8D3
oklch(70.7% 0.089 240.8)
-
Step 500
500
#4091C8
oklch(63.1% 0.114 241.6)
-
Step 600
600
#147BB4
oklch(55.7% 0.123 240.6)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800 (this color)
#155B85
oklch(45.1% 0.095 241)
-
Step 900
900
#154665
oklch(37.8% 0.074 240.9)
-
Step 950
950
#0E293B
oklch(27% 0.047 240.8)
#155B85 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) | #475C87 | 0.047 |
| Deuteranopia (no green cones) | #385284 | 0.036 |
| Tritanopia (no blue cones) | #00656A | 0.063 |
| Achromatopsia (no color) | #565656 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155B85
#155B85
oklch(45.1% 0.095 241)
- #7B4712
#7B4712
oklch(45.1% 0.095 60.6)
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 #155B85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.019
- Deep Sea Blue #015482 ΔE 0.024
- Dusk Blue #26538D ΔE 0.031
- Light Navy #155084 ΔE 0.034
- Peacock Blue #016795 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.040
- YInMn Blue #415A77 ΔE 0.042
- Denim #3B638C ΔE 0.043
Use #155B85 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.