#515F90
Closest named color: Dusky Blue (#475F94). oklch(49.5% 0.081 271.1), rgb(81, 95, 144).
Aa
White text reads best on this color (6.19:1).
About this color
#515F90 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.081 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.014 away. White text reads best on it, at 6.19:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.38:1 |
| White text | 6.19:1 |
Values
| HEX | #515F90 |
| RGB | rgb(81, 95, 144) |
| HSL | hsl(227, 28%, 44%) |
| OKLCH | oklch(49.5% 0.081 271.1) |
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 #515F90 | 6.19:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #515F90 | 3.38:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #515F90 text on white | 6.19:1 | AA | Lc 80.8 | Fine for body text |
| #515F90 text on black | 3.38:1 | AA large text | Lc -21.0 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B7C0DB
oklch(80.9% 0.039 270.9)
-
Step 400
400
#929FC8
oklch(70.7% 0.062 271)
-
Step 500
500
#7787BA
oklch(63.1% 0.079 270.6)
-
Step 600
600
#6170A6
oklch(55.6% 0.086 271.5)
-
Step 700
700 (this color)
#515F90
oklch(49.5% 0.081 271.1)
-
Step 800
800
#414D74
oklch(42.8% 0.067 270.3)
-
Step 900
900
#37405D
oklch(37.6% 0.051 270.6)
-
Step 950
950
#202637
oklch(27.1% 0.033 269.2)
#515F90 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) | #4E6492 | 0.014 |
| Deuteranopia (no green cones) | #485F8F | 0.012 |
| Tritanopia (no blue cones) | #3C6971 | 0.072 |
| Achromatopsia (no color) | #616161 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515F90
#515F90
oklch(49.5% 0.081 271.1)
- #736026
#736026
oklch(49.6% 0.08 91)
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 #515F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.014
- Denim #3B638C ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.032
- Dusk #4E5481 ΔE 0.036
- Twilight #4E518B ΔE 0.040
- Dusty Grape #545775 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.048
- YInMn Blue #415A77 ΔE 0.048
Use #515F90 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.