#515F88
Closest named color: Dusky Blue (#475F94). oklch(49.1% 0.068 269.3), rgb(81, 95, 136).
Aa
White text reads best on this color (6.28:1).
About this color
#515F88 is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.068 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.023 away. White text reads best on it, at 6.28:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.34:1 |
| White text | 6.28:1 |
Values
| HEX | #515F88 |
| RGB | rgb(81, 95, 136) |
| HSL | hsl(225, 25%, 43%) |
| OKLCH | oklch(49.1% 0.068 269.3) |
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 #515F88 | 6.28:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #515F88 | 3.34:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #515F88 text on white | 6.28:1 | AA | Lc 81.3 | Fine for body text |
| #515F88 text on black | 3.34:1 | AA large text | Lc -20.6 | 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 700.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B8C0D7
oklch(80.9% 0.034 270.4)
-
Step 400
400
#93A0C2
oklch(70.7% 0.052 268.6)
-
Step 500
500
#7988B3
oklch(63.1% 0.067 269.5)
-
Step 600
600
#62719F
oklch(55.5% 0.074 270)
-
Step 700
700 (this color)
#515F88
oklch(49.1% 0.068 269.3)
-
Step 800
800
#424E6E
oklch(42.7% 0.056 268.2)
-
Step 900
900
#384159
oklch(37.8% 0.043 268.4)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#515F88 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) | #51638A | 0.011 |
| Deuteranopia (no green cones) | #4C5E87 | 0.008 |
| Tritanopia (no blue cones) | #40676D | 0.061 |
| Achromatopsia (no color) | #606060 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515F88
#515F88
oklch(49.1% 0.068 269.3)
- #705F30
#705F30
oklch(49.1% 0.069 89.9)
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 #515F88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.023
- Denim #3B638C ΔE 0.027
- Dusk #4E5481 ΔE 0.033
- Dusty Grape #545775 ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.038
- Twilight #4E518B ΔE 0.043
- Slate #516572 ΔE 0.045
Use #515F88 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.