#515FAC
Closest named color: French Blue (#436BAD). oklch(51.2% 0.122 273.6), rgb(81, 95, 172).
Aa
White text reads best on this color (5.86:1).
About this color
#515FAC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.122 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 5.86:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.58:1 |
| White text | 5.86:1 |
Values
| HEX | #515FAC |
| RGB | rgb(81, 95, 172) |
| HSL | hsl(231, 36%, 50%) |
| OKLCH | oklch(51.2% 0.122 273.6) |
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 #515FAC | 5.86:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #515FAC | 3.58:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #515FAC text on white | 5.86:1 | AA | Lc 79.2 | Fine for body text |
| #515FAC text on black | 3.58:1 | AA large text | Lc -22.6 | 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
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B4BFE8
oklch(81% 0.059 273.2)
-
Step 400
400
#8D9CDC
oklch(70.6% 0.095 273.6)
-
Step 500
500
#7283D2
oklch(63.1% 0.121 273.3)
-
Step 600
600
#5C6BC0
oklch(55.6% 0.132 273.8)
-
Step 700
700 (this color)
#515FAC
oklch(51.2% 0.122 273.6)
-
Step 800
800
#3E4986
oklch(42.7% 0.102 273.6)
-
Step 900
900
#343E6B
oklch(37.8% 0.078 272.7)
-
Step 950
950
#1F243F
oklch(27% 0.051 274.5)
#515FAC 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) | #3E69AF | 0.032 |
| Deuteranopia (no green cones) | #3461AA | 0.033 |
| Tritanopia (no blue cones) | #28707D | 0.109 |
| Achromatopsia (no color) | #656565 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515FAC
#515FAC
oklch(51.2% 0.122 273.6)
- #7B6400
#7B6400
oklch(51.1% 0.105 93.1)
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 #515FAC, closest first.
No curated palette has a color within ΔE 0.04 of #515FAC.
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 0.042
- Mid Blue #276AB3 ΔE 0.047
- Iris #6258C4 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.059
- Twilight #4E518B ΔE 0.061
- Muted Blue #3B719F ΔE 0.062
Use #515FAC 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.