#15558D
Closest named color: Dusk Blue (#26538D). oklch(44.1% 0.111 249.9), rgb(21, 85, 141).
Aa
White text reads best on this color (7.73:1).
About this color
#15558D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.111 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.012 away. White text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #15558D |
| RGB | rgb(21, 85, 141) |
| HSL | hsl(208, 74%, 32%) |
| OKLCH | oklch(44.1% 0.111 249.9) |
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 #15558D | 7.73:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #15558D | 2.71:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #15558D text on white | 7.73:1 | AAA | Lc 86.4 | Fine for body text |
| #15558D text on black | 2.71:1 | Fails | Lc -15.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF1
oklch(88.6% 0.036 249.5)
-
Step 300
300
#A1C5EA
oklch(81% 0.065 249.3)
-
Step 400
400
#6DA5DF
oklch(70.7% 0.104 250.3)
-
Step 500
500
#428ED6
oklch(63.2% 0.132 249.6)
-
Step 600
600
#1B76C3
oklch(55.5% 0.144 249.8)
-
Step 700
700
#0A63A9
oklch(49.1% 0.134 249.9)
-
Step 800
800 (this color)
#15558D
oklch(44.1% 0.111 249.9)
-
Step 900
900
#17446D
oklch(37.8% 0.086 249.5)
-
Step 950
950
#0F2840
oklch(27% 0.055 249.7)
#15558D 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) | #3A588F | 0.035 |
| Deuteranopia (no green cones) | #274E8C | 0.022 |
| Tritanopia (no blue cones) | #00626A | 0.080 |
| Achromatopsia (no color) | #535353 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15558D
#15558D
oklch(44.1% 0.111 249.9)
- #744800
#744800
oklch(44.2% 0.096 70.1)
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 #15558D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.012
- Light Navy #155084 ΔE 0.019
- Deep Sea Blue #015482 ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.028
- Cobalt #1E488F ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.040
- Peacock Blue #016795 ΔE 0.052
- Denim #3B638C ΔE 0.057
Use #15558D 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.