#515DA4
Closest named color: Dusky Blue (#475F94). oklch(50.3% 0.113 274.4), rgb(81, 93, 164).
Aa
White text reads best on this color (6.08:1).
About this color
#515DA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.113 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.031 away. White text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.45:1 |
| White text | 6.08:1 |
Values
| HEX | #515DA4 |
| RGB | rgb(81, 93, 164) |
| HSL | hsl(231, 34%, 48%) |
| OKLCH | oklch(50.3% 0.113 274.4) |
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 #515DA4 | 6.08:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #515DA4 | 3.45:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #515DA4 text on white | 6.08:1 | AA | Lc 80.2 | Fine for body text |
| #515DA4 text on black | 3.45:1 | AA large text | Lc -21.6 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D3D8EE
oklch(88.5% 0.031 275.6)
-
Step 300
300
#B5BFE5
oklch(81% 0.055 273.5)
-
Step 400
400
#909DD8
oklch(70.8% 0.088 274.4)
-
Step 500
500
#7583CD
oklch(63% 0.113 274.6)
-
Step 600
600
#5E6CBA
oklch(55.6% 0.122 274.1)
-
Step 700
700 (this color)
#515DA4
oklch(50.3% 0.113 274.4)
-
Step 800
800
#404A82
oklch(42.8% 0.093 274.2)
-
Step 900
900
#363E68
oklch(37.7% 0.073 274.2)
-
Step 950
950
#20243D
oklch(26.9% 0.047 275.9)
#515DA4 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) | #4066A7 | 0.029 |
| Deuteranopia (no green cones) | #385FA2 | 0.030 |
| Tritanopia (no blue cones) | #2F6C78 | 0.101 |
| Achromatopsia (no color) | #626262 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515DA4
#515DA4
oklch(50.3% 0.113 274.4)
- #776200
#776200
oklch(50.2% 0.103 94.3)
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 #515DA4, closest first.
No curated palette has a color within ΔE 0.04 of #515DA4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.031
- French Blue #436BAD ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.042
- Twilight #4E518B ΔE 0.048
- Mid Blue #276AB3 ΔE 0.052
- Denim #3B638C ΔE 0.054
- Dusk #4E5481 ΔE 0.058
- Iris #6258C4 ΔE 0.059
Use #515DA4 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.