#525FA9
Closest named color: French Blue (#436BAD). oklch(51.1% 0.118 274), rgb(82, 95, 169).
Aa
White text reads best on this color (5.88:1).
About this color
#525FA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.118 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 5.88:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #525FA9 |
| RGB | rgb(82, 95, 169) |
| HSL | hsl(231, 35%, 49%) |
| OKLCH | oklch(51.1% 0.118 274) |
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 #525FA9 | 5.88:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #525FA9 | 3.56:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #525FA9 text on white | 5.88:1 | AA | Lc 79.3 | Fine for body text |
| #525FA9 text on black | 3.56:1 | AA large text | Lc -22.5 | 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
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B5BFE6
oklch(81% 0.056 273.8)
-
Step 400
400
#8F9DDA
oklch(70.8% 0.091 273.9)
-
Step 500
500
#7483D0
oklch(63.1% 0.117 274.2)
-
Step 600
600
#5D6BBD
oklch(55.5% 0.128 274.2)
-
Step 700
700 (this color)
#525FA9
oklch(51.1% 0.118 274)
-
Step 800
800
#3F4984
oklch(42.7% 0.098 274.2)
-
Step 900
900
#353E6A
oklch(37.8% 0.076 273.5)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#525FA9 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) | #4068AC | 0.030 |
| Deuteranopia (no green cones) | #3861A7 | 0.031 |
| Tritanopia (no blue cones) | #2D6F7C | 0.104 |
| Achromatopsia (no color) | #646464 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #525FA9
#525FA9
oklch(51.1% 0.118 274)
- #7A6400
#7A6400
oklch(51% 0.105 93.8)
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 #525FA9, closest first.
No curated palette has a color within ΔE 0.04 of #525FA9.
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 0.038
- Mid Blue #276AB3 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.049
- Iris #6258C4 ΔE 0.053
- Twilight #4E518B ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.059
- Denim #3B638C ΔE 0.059
Use #525FA9 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.