#515B99
Closest named color: Dusky Blue (#475F94). oklch(49.2% 0.1 275.2), rgb(81, 91, 153).
Aa
White text reads best on this color (6.35:1).
About this color
#515B99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.100 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.020 away. White text reads best on it, at 6.35:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.30:1 |
| White text | 6.35:1 |
Values
| HEX | #515B99 |
| RGB | rgb(81, 91, 153) |
| HSL | hsl(232, 31%, 46%) |
| OKLCH | oklch(49.2% 0.1 275.2) |
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 #515B99 | 6.35:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #515B99 | 3.30:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #515B99 text on white | 6.35:1 | AA | Lc 81.5 | Fine for body text |
| #515B99 text on black | 3.30:1 | AA large text | Lc -20.4 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EB
oklch(88.5% 0.026 276.4)
-
Step 300
300
#B7BFE0
oklch(80.9% 0.047 274.6)
-
Step 400
400
#929DD1
oklch(70.6% 0.077 275)
-
Step 500
500
#7884C5
oklch(63% 0.099 275.2)
-
Step 600
600
#626DB2
oklch(55.7% 0.108 275.5)
-
Step 700
700 (this color)
#515B99
oklch(49.2% 0.1 275.2)
-
Step 800
800
#424A7C
oklch(42.6% 0.083 275.4)
-
Step 900
900
#383E64
oklch(37.7% 0.065 276)
-
Step 950
950
#21253A
oklch(27.1% 0.04 275.2)
#515B99 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) | #44629B | 0.024 |
| Deuteranopia (no green cones) | #3E5D98 | 0.024 |
| Tritanopia (no blue cones) | #376872 | 0.089 |
| Achromatopsia (no color) | #5F5F5F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515B99
#515B99
oklch(49.2% 0.1 275.2)
- #736004
#736004
oklch(49.3% 0.1 95.2)
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 #515B99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.020
- Denim Blue #3B5B92 ΔE 0.031
- Twilight #4E518B ΔE 0.033
- Dusk #4E5481 ΔE 0.041
- Denim #3B638C ΔE 0.043
- French Blue #436BAD ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.052
- Dusty Grape #545775 ΔE 0.057
Use #515B99 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.