#515E8B
Closest named color: Dusky Blue (#475F94). oklch(49.1% 0.074 271.2), rgb(81, 94, 139).
Aa
White text reads best on this color (6.31:1).
About this color
#515E8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.074 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.018 away. White text reads best on it, at 6.31:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.32:1 |
| White text | 6.31:1 |
Values
| HEX | #515E8B |
| RGB | rgb(81, 94, 139) |
| HSL | hsl(227, 26%, 43%) |
| OKLCH | oklch(49.1% 0.074 271.2) |
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 #515E8B | 6.31:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #515E8B | 3.32:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #515E8B text on white | 6.31:1 | AA | Lc 81.4 | Fine for body text |
| #515E8B text on black | 3.32:1 | AA large text | Lc -20.5 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B8C0D9
oklch(81% 0.036 271.5)
-
Step 400
400
#939FC5
oklch(70.6% 0.057 271.2)
-
Step 500
500
#7987B7
oklch(63.1% 0.074 271.6)
-
Step 600
600
#6271A2
oklch(55.7% 0.079 270.7)
-
Step 700
700 (this color)
#515E8B
oklch(49.1% 0.074 271.2)
-
Step 800
800
#424D71
oklch(42.7% 0.062 270.6)
-
Step 900
900
#38405B
oklch(37.6% 0.048 271.3)
-
Step 950
950
#212635
oklch(27.1% 0.029 270.1)
#515E8B 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) | #4F628D | 0.011 |
| Deuteranopia (no green cones) | #4A5D8A | 0.010 |
| Tritanopia (no blue cones) | #3E676E | 0.067 |
| Achromatopsia (no color) | #606060 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515E8B
#515E8B
oklch(49.1% 0.074 271.2)
- #705F2B
#705F2B
oklch(49.1% 0.074 91.4)
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 #515E8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.018
- Denim #3B638C ΔE 0.029
- Dusk #4E5481 ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.033
- Dusty Grape #545775 ΔE 0.036
- Twilight #4E518B ΔE 0.038
- YInMn Blue #415A77 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.045
Use #515E8B 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.