#525DB1
Closest named color: Iris (#6258C4). oklch(51.2% 0.132 275.1), rgb(82, 93, 177).
Aa
White text reads best on this color (5.89:1).
About this color
#525DB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.132 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.040 away. White text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.55:1 |
| White text | 5.89:1 |
Values
| HEX | #525DB1 |
| RGB | rgb(82, 93, 177) |
| HSL | hsl(233, 38%, 51%) |
| OKLCH | oklch(51.2% 0.132 275.1) |
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 #525DB1 | 5.89:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #525DB1 | 3.55:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #525DB1 text on white | 5.89:1 | AA | Lc 79.3 | Fine for body text |
| #525DB1 text on black | 3.55:1 | 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
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B4BEEB
oklch(80.9% 0.065 275.1)
-
Step 400
400
#8E9BE0
oklch(70.6% 0.102 275.3)
-
Step 500
500
#7381D8
oklch(63.1% 0.131 275.1)
-
Step 600
600
#5D69C5
oklch(55.6% 0.142 275.2)
-
Step 700
700 (this color)
#525DB1
oklch(51.2% 0.132 275.1)
-
Step 800
800
#3F478A
oklch(42.6% 0.11 275.6)
-
Step 900
900
#353C6E
oklch(37.6% 0.086 275.5)
-
Step 950
950
#1F2441
oklch(27.1% 0.054 274.8)
#525DB1 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) | #3768B4 | 0.039 |
| Deuteranopia (no green cones) | #2C60AF | 0.042 |
| Tritanopia (no blue cones) | #256F7E | 0.117 |
| Achromatopsia (no color) | #646464 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #525DB1
#525DB1
oklch(51.2% 0.132 275.1)
- #796500
#796500
oklch(51.1% 0.105 95.4)
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 #525DB1, closest first.
No curated palette has a color within ΔE 0.04 of #525DB1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.040
- French Blue #436BAD ΔE 0.042
- Mid Blue #276AB3 ΔE 0.051
- Dusky Blue #475F94 ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.059
- Light Indigo #6D5ACF ΔE 0.063
Use #525DB1 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.