#515E81
Closest named color: Dusty Grape (#545775). oklch(48.5% 0.059 268.5), rgb(81, 94, 129).
Aa
White text reads best on this color (6.42:1).
About this color
#515E81 is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.059 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.024 away. White text reads best on it, at 6.42:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #515E81 |
| RGB | rgb(81, 94, 129) |
| HSL | hsl(224, 23%, 41%) |
| OKLCH | oklch(48.5% 0.059 268.5) |
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 #515E81 | 6.42:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #515E81 | 3.26:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #515E81 text on white | 6.42:1 | AA | Lc 81.9 | Fine for body text |
| #515E81 text on black | 3.26:1 | AA large text | Lc -20.0 | 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
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#B9C0D4
oklch(80.9% 0.029 270.3)
-
Step 400
400
#94A0BE
oklch(70.7% 0.046 268)
-
Step 500
500
#7A89AE
oklch(63.2% 0.059 267.5)
-
Step 600
600
#647299
oklch(55.6% 0.063 269)
-
Step 700
700 (this color)
#515E81
oklch(48.5% 0.059 268.5)
-
Step 800
800
#444E6A
oklch(42.7% 0.048 269.1)
-
Step 900
900
#394156
oklch(37.7% 0.038 268.4)
-
Step 950
950
#212632
oklch(26.9% 0.024 267.1)
#515E81 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) | #526183 | 0.009 |
| Deuteranopia (no green cones) | #4E5D80 | 0.006 |
| Tritanopia (no blue cones) | #43656A | 0.053 |
| Achromatopsia (no color) | #5F5F5F | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515E81
#515E81
oklch(48.5% 0.059 268.5)
- #6D5D37
#6D5D37
oklch(48.5% 0.058 87.4)
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 #515E81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.024
- YInMn Blue #415A77 ΔE 0.030
- Dusk #4E5481 ΔE 0.031
- Denim #3B638C ΔE 0.031
- Dusky Blue #475F94 ΔE 0.032
- Slate #516572 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.042
- Twilight #4E518B ΔE 0.046
Use #515E81 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.