#155A8E
Closest named color: Light Navy Blue (#2E5A88). oklch(45.4% 0.107 246.7), rgb(21, 90, 142).
Aa
White text reads best on this color (7.27:1).
About this color
#155A8E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.107 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.020 away. White text reads best on it, at 7.27:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.88:1 |
| White text | 7.27:1 |
Values
| HEX | #155A8E |
| RGB | rgb(21, 90, 142) |
| HSL | hsl(206, 74%, 32%) |
| OKLCH | oklch(45.4% 0.107 246.7) |
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 #155A8E | 7.27:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #155A8E | 2.88:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #155A8E text on white | 7.27:1 | AAA | Lc 84.9 | Fine for body text |
| #155A8E text on black | 2.88:1 | Fails | Lc -17.1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#A0C5E7
oklch(80.8% 0.062 246.4)
-
Step 400
400
#6BA6DC
oklch(70.6% 0.101 247.3)
-
Step 500
500
#3E8FD2
oklch(63.1% 0.128 246.7)
-
Step 600
600
#1278BF
oklch(55.6% 0.139 246.6)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800 (this color)
#155A8E
oklch(45.4% 0.107 246.7)
-
Step 900
900
#14456B
oklch(37.8% 0.083 246.2)
-
Step 950
950
#0E283F
oklch(26.9% 0.054 248)
#155A8E 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) | #415C90 | 0.040 |
| Deuteranopia (no green cones) | #30528D | 0.028 |
| Tritanopia (no blue cones) | #00676D | 0.077 |
| Achromatopsia (no color) | #575757 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155A8E
#155A8E
oklch(45.4% 0.107 246.7)
- #7B4900
#7B4900
oklch(45.4% 0.101 66.5)
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 #155A8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.020
- Dusk Blue #26538D ΔE 0.021
- Deep Sea Blue #015482 ΔE 0.027
- Light Navy #155084 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.033
- Peacock Blue #016795 ΔE 0.038
- Denim #3B638C ΔE 0.045
- Dusky Blue #475F94 ΔE 0.051
Use #155A8E 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.