#515FAE
Closest named color: French Blue (#436BAD). oklch(51.3% 0.125 273.6), rgb(81, 95, 174).
Aa
White text reads best on this color (5.83:1).
About this color
#515FAE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.125 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.035 away. White text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #515FAE |
| RGB | rgb(81, 95, 174) |
| HSL | hsl(231, 36%, 50%) |
| OKLCH | oklch(51.3% 0.125 273.6) |
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 #515FAE | 5.83:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #515FAE | 3.59:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #515FAE text on white | 5.83:1 | AA | Lc 79.0 | Fine for body text |
| #515FAE text on black | 3.59:1 | AA large text | Lc -22.8 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B4BFE9
oklch(81% 0.061 273.5)
-
Step 400
400
#8D9CDD
oklch(70.6% 0.097 273.7)
-
Step 500
500
#7283D4
oklch(63.2% 0.123 273.4)
-
Step 600
600
#5B6BC1
oklch(55.6% 0.134 273.4)
-
Step 700
700 (this color)
#515FAE
oklch(51.3% 0.125 273.6)
-
Step 800
800
#3E4987
oklch(42.8% 0.103 273.7)
-
Step 900
900
#343D6C
oklch(37.6% 0.081 273.7)
-
Step 950
950
#1F243F
oklch(27% 0.051 274.5)
#515FAE 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) | #3D69B1 | 0.032 |
| Deuteranopia (no green cones) | #3261AC | 0.035 |
| Tritanopia (no blue cones) | #25707E | 0.111 |
| Achromatopsia (no color) | #656565 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515FAE
#515FAE
oklch(51.3% 0.125 273.6)
- #7B6500
#7B6500
oklch(51.3% 0.105 93.9)
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 #515FAE, closest first.
No curated palette has a color within ΔE 0.04 of #515FAE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.035
- Dusky Blue #475F94 ΔE 0.045
- Mid Blue #276AB3 ΔE 0.047
- Iris #6258C4 ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.060
- Slate Blue #6A5ACD ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.063
Use #515FAE 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.