#525DB4
Closest named color: Iris (#6258C4). oklch(51.4% 0.137 275.1), rgb(82, 93, 180).
Aa
White text reads best on this color (5.86:1).
About this color
#525DB4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.137 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.037 away. White text reads best on it, at 5.86:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.58:1 |
| White text | 5.86:1 |
Values
| HEX | #525DB4 |
| RGB | rgb(82, 93, 180) |
| HSL | hsl(233, 40%, 51%) |
| OKLCH | oklch(51.4% 0.137 275.1) |
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 #525DB4 | 5.86:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #525DB4 | 3.58:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #525DB4 text on white | 5.86:1 | AA | Lc 79.1 | Fine for body text |
| #525DB4 text on black | 3.58:1 | AA large text | Lc -22.7 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F2
oklch(88.6% 0.036 275.3)
-
Step 300
300
#B4BEEC
oklch(80.9% 0.066 275.3)
-
Step 400
400
#8D9BE2
oklch(70.6% 0.105 274.9)
-
Step 500
500
#7381DA
oklch(63.2% 0.134 275.1)
-
Step 600
600
#5C68C8
oklch(55.6% 0.148 275.2)
-
Step 700
700 (this color)
#525DB4
oklch(51.4% 0.137 275.1)
-
Step 800
800
#3E478C
oklch(42.7% 0.113 274.9)
-
Step 900
900
#353C70
oklch(37.7% 0.089 275.5)
-
Step 950
950
#1F2441
oklch(27.1% 0.054 274.8)
#525DB4 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) | #3469B7 | 0.042 |
| Deuteranopia (no green cones) | #2861B2 | 0.045 |
| Tritanopia (no blue cones) | #227080 | 0.120 |
| Achromatopsia (no color) | #656565 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #525DB4
#525DB4
oklch(51.4% 0.137 275.1)
- #7A6600
#7A6600
oklch(51.4% 0.106 95.5)
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 #525DB4, closest first.
No curated palette has a color within ΔE 0.04 of #525DB4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.037
- French Blue #436BAD ΔE 0.043
- Mid Blue #276AB3 ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.054
- Dusky Blue #475F94 ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.063
Use #525DB4 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.