#155F88
Closest named color: Light Navy Blue (#2E5A88). oklch(46.3% 0.095 239.1), rgb(21, 95, 136).
Aa
White text reads best on this color (6.94:1).
About this color
#155F88 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.095 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.021 away. White text reads best on it, at 6.94:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 3.02:1 |
| White text | 6.94:1 |
Values
| HEX | #155F88 |
| RGB | rgb(21, 95, 136) |
| HSL | hsl(201, 73%, 31%) |
| OKLCH | oklch(46.3% 0.095 239.1) |
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 #155F88 | 6.94:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #155F88 | 3.02:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #155F88 text on white | 6.94:1 | AA | Lc 83.6 | Fine for body text |
| #155F88 text on black | 3.02:1 | AA large text | Lc -18.3 | 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 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
#A6C5DC
oklch(80.8% 0.047 240.3)
-
Step 400
400
#75A7CA
oklch(70.6% 0.074 239.7)
-
Step 500
500
#4E91BC
oklch(63% 0.094 238.8)
-
Step 600
600
#2E7BA9
oklch(55.7% 0.103 239)
-
Step 700
700 (this color)
#155F88
oklch(46.3% 0.095 239.1)
-
Step 800
800
#1D5475
oklch(42.6% 0.079 239.1)
-
Step 900
900
#1F465F
oklch(37.8% 0.062 239.4)
-
Step 950
950
#132937
oklch(27% 0.038 238.3)
#155F88 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) | #4B5F8A | 0.050 |
| Deuteranopia (no green cones) | #3C5587 | 0.040 |
| Tritanopia (no blue cones) | #00696D | 0.062 |
| Achromatopsia (no color) | #5A5A5A | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155F88
#155F88
oklch(46.3% 0.095 239.1)
- #7F4A18
#7F4A18
oklch(46.3% 0.095 59.5)
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 #155F88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.021
- Peacock Blue #016795 ΔE 0.028
- Denim #3B638C ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.038
- Dusk Blue #26538D ΔE 0.039
- YInMn Blue #415A77 ΔE 0.043
- Light Navy #155084 ΔE 0.045
Use #155F88 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.