#515BA5
Closest named color: Dusky Blue (#475F94). oklch(49.9% 0.118 275.5), rgb(81, 91, 165).
Aa
White text reads best on this color (6.19:1).
About this color
#515BA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.118 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.034 away. White text reads best on it, at 6.19:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.38:1 |
| White text | 6.19:1 |
Values
| HEX | #515BA5 |
| RGB | rgb(81, 91, 165) |
| HSL | hsl(233, 34%, 48%) |
| OKLCH | oklch(49.9% 0.118 275.5) |
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 #515BA5 | 6.19:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #515BA5 | 3.38:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #515BA5 text on white | 6.19:1 | AA | Lc 80.7 | Fine for body text |
| #515BA5 text on black | 3.38:1 | AA large text | Lc -21.1 | 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
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B6BEE6
oklch(80.9% 0.057 276.2)
-
Step 400
400
#909CDA
oklch(70.7% 0.092 275.4)
-
Step 500
500
#7682CF
oklch(63% 0.117 275.8)
-
Step 600
600
#5F6BBC
oklch(55.6% 0.126 275.2)
-
Step 700
700 (this color)
#515BA5
oklch(49.9% 0.118 275.5)
-
Step 800
800
#414984
oklch(42.8% 0.098 275.7)
-
Step 900
900
#363D69
oklch(37.6% 0.076 275.3)
-
Step 950
950
#20243E
oklch(27% 0.049 276)
#515BA5 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) | #3C65A8 | 0.034 |
| Deuteranopia (no green cones) | #345EA3 | 0.035 |
| Tritanopia (no blue cones) | #2F6B78 | 0.104 |
| Achromatopsia (no color) | #616161 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515BA5
#515BA5
oklch(49.9% 0.118 275.5)
- #756200
#756200
oklch(50% 0.103 95.8)
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 #515BA5, closest first.
No curated palette has a color within ΔE 0.04 of #515BA5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.043
- French Blue #436BAD ΔE 0.044
- Twilight #4E518B ΔE 0.047
- Mid Blue #276AB3 ΔE 0.055
- Iris #6258C4 ΔE 0.056
- Denim #3B638C ΔE 0.057
- Dusk #4E5481 ΔE 0.059
Use #515BA5 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.