#155F8A
Closest named color: Light Navy Blue (#2E5A88). oklch(46.4% 0.098 240.4), rgb(21, 95, 138).
Aa
White text reads best on this color (6.91:1).
About this color
#155F8A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.098 and its hue 240°. 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 6.91:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #155F8A |
| RGB | rgb(21, 95, 138) |
| HSL | hsl(202, 74%, 31%) |
| OKLCH | oklch(46.4% 0.098 240.4) |
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 #155F8A | 6.91:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #155F8A | 3.03:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #155F8A text on white | 6.91:1 | AA | Lc 83.5 | Fine for body text |
| #155F8A text on black | 3.03:1 | AA large text | Lc -18.4 | 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 700.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE9
oklch(88.5% 0.026 239.1)
-
Step 300
300
#A6C5DD
oklch(80.9% 0.048 241.5)
-
Step 400
400
#75A7CB
oklch(70.6% 0.075 240.4)
-
Step 500
500
#4E91BE
oklch(63.1% 0.096 240.1)
-
Step 600
600
#2E7AAA
oklch(55.5% 0.105 240.4)
-
Step 700
700 (this color)
#155F8A
oklch(46.4% 0.098 240.4)
-
Step 800
800
#1D5477
oklch(42.7% 0.081 240.6)
-
Step 900
900
#1E4660
oklch(37.8% 0.063 239.9)
-
Step 950
950
#132938
oklch(27% 0.04 240.2)
#155F8A 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) | #4B608C | 0.050 |
| Deuteranopia (no green cones) | #3B5589 | 0.039 |
| Tritanopia (no blue cones) | #006A6E | 0.066 |
| Achromatopsia (no color) | #5A5A5A | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155F8A
#155F8A
oklch(46.4% 0.098 240.4)
- #804A14
#804A14
oklch(46.4% 0.098 60.2)
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 #155F8A, 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
- Peacock Blue #016795 ΔE 0.026
- Denim #3B638C ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.037
- Dusk Blue #26538D ΔE 0.037
- YInMn Blue #415A77 ΔE 0.044
- Light Navy #155084 ΔE 0.045
Use #155F8A 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.