#155478
Closest named color: Deep Sea Blue (#015482). oklch(42.5% 0.085 239.2), rgb(21, 84, 120).
Aa
White text reads best on this color (8.16:1).
About this color
#155478 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.085 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.018 away. White text reads best on it, at 8.16:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.57:1 |
| White text | 8.16:1 |
Values
| HEX | #155478 |
| RGB | rgb(21, 84, 120) |
| HSL | hsl(202, 70%, 28%) |
| OKLCH | oklch(42.5% 0.085 239.2) |
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 #155478 | 8.16:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #155478 | 2.57:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #155478 text on white | 8.16:1 | AAA | Lc 87.9 | Fine for body text |
| #155478 text on black | 2.57:1 | Fails | Lc -14.2 | Not readable |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A4C6DE
oklch(81% 0.05 239)
-
Step 400
400
#71A8CD
oklch(70.7% 0.079 238.8)
-
Step 500
500
#4891C1
oklch(63% 0.103 240)
-
Step 600
600
#247BAD
oklch(55.6% 0.111 239.2)
-
Step 700
700
#146795
oklch(49% 0.104 239.7)
-
Step 800
800 (this color)
#155478
oklch(42.5% 0.085 239.2)
-
Step 900
900
#1A4661
oklch(37.7% 0.067 239.1)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#155478 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) | #43547A | 0.045 |
| Deuteranopia (no green cones) | #354B77 | 0.036 |
| Tritanopia (no blue cones) | #005D61 | 0.056 |
| Achromatopsia (no color) | #4F4F4F | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155478
#155478
oklch(42.5% 0.085 239.2)
- #704217
#704217
oklch(42.6% 0.085 59.8)
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 #155478, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.018
- Light Navy #155084 ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.038
- Dusk Blue #26538D ΔE 0.039
- Petrol #005F6A ΔE 0.048
- YInMn Blue #415A77 ΔE 0.048
- Deep Teal #00555A ΔE 0.055
- Twilight Blue #0A437A ΔE 0.055
Use #155478 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.