#155C7B
Closest named color: Light Navy Blue (#2E5A88). oklch(44.8% 0.083 232.5), rgb(21, 92, 123).
Aa
White text reads best on this color (7.37:1).
About this color
#155C7B is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.083 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.031 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #155C7B |
| RGB | rgb(21, 92, 123) |
| HSL | hsl(198, 71%, 28%) |
| OKLCH | oklch(44.8% 0.083 232.5) |
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 #155C7B | 7.37:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #155C7B | 2.84:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #155C7B text on white | 7.37:1 | AAA | Lc 85.3 | Fine for body text |
| #155C7B text on black | 2.84:1 | Fails | Lc -16.8 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A2C7DB
oklch(80.9% 0.049 231.7)
-
Step 400
400
#6DA9C9
oklch(70.6% 0.078 232.7)
-
Step 500
500
#4194BC
oklch(63.2% 0.1 232.4)
-
Step 600
600
#167DA8
oklch(55.6% 0.109 232.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800 (this color)
#155C7B
oklch(44.8% 0.083 232.5)
-
Step 900
900
#16475E
oklch(37.7% 0.065 232.7)
-
Step 950
950
#0F2A37
oklch(27.1% 0.041 231.9)
#155C7B 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) | #4C5B7C | 0.053 |
| Deuteranopia (no green cones) | #3F527B | 0.045 |
| Tritanopia (no blue cones) | #006466 | 0.050 |
| Achromatopsia (no color) | #565656 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155C7B
#155C7B
oklch(44.8% 0.083 232.5)
- #784625
#784625
oklch(44.7% 0.083 52.4)
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 #155C7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.032
- Petrol #005F6A ΔE 0.034
- YInMn Blue #415A77 ΔE 0.038
- Light Navy #155084 ΔE 0.043
- Dusk Blue #26538D ΔE 0.046
- Peacock Blue #016795 ΔE 0.047
- Denim #3B638C ΔE 0.048
Use #155C7B 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.