#155F8F
Closest named color: Light Navy Blue (#2E5A88). oklch(46.7% 0.104 243.2), rgb(21, 95, 143).
Aa
White text reads best on this color (6.85:1).
About this color
#155F8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.104 and its hue 243°. 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 6.85:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #155F8F |
| RGB | rgb(21, 95, 143) |
| HSL | hsl(204, 74%, 32%) |
| OKLCH | oklch(46.7% 0.104 243.2) |
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 #155F8F | 6.85:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #155F8F | 3.06:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #155F8F text on white | 6.85:1 | AA | Lc 83.3 | Fine for body text |
| #155F8F text on black | 3.06:1 | AA large text | Lc -18.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A6C5DF
oklch(80.9% 0.05 243.7)
-
Step 400
400
#74A7CF
oklch(70.8% 0.08 242.8)
-
Step 500
500
#4D90C3
oklch(63.1% 0.103 243.5)
-
Step 600
600
#2D79AF
oklch(55.5% 0.112 243.6)
-
Step 700
700 (this color)
#155F8F
oklch(46.7% 0.104 243.2)
-
Step 800
800
#1C537A
oklch(42.6% 0.086 243.6)
-
Step 900
900
#1E4562
oklch(37.6% 0.067 243.4)
-
Step 950
950
#12293A
oklch(27.1% 0.043 242.6)
#155F8F 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) | #486091 | 0.046 |
| Deuteranopia (no green cones) | #37568E | 0.034 |
| Tritanopia (no blue cones) | #006B70 | 0.072 |
| Achromatopsia (no color) | #5A5A5A | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155F8F
#155F8F
oklch(46.7% 0.104 243.2)
- #824B06
#824B06
oklch(46.8% 0.104 63.1)
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 #155F8F, 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 0.023
- Denim Blue #3B5B92 ΔE 0.032
- Denim #3B638C ΔE 0.034
- Dusk Blue #26538D ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.039
- Dusky Blue #475F94 ΔE 0.045
- Light Navy #155084 ΔE 0.046
Use #155F8F 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.