#5251B1
Closest named color: Iris (#6258C4). oklch(48.8% 0.149 279.8), rgb(82, 81, 177).
Aa
White text reads best on this color (6.62:1).
About this color
#5251B1 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.149 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.043 away. White text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.17:1 |
| White text | 6.62:1 |
Values
| HEX | #5251B1 |
| RGB | rgb(82, 81, 177) |
| HSL | hsl(241, 38%, 51%) |
| OKLCH | oklch(48.8% 0.149 279.8) |
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 #5251B1 | 6.62:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #5251B1 | 3.17:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #5251B1 text on white | 6.62:1 | AA | Lc 82.5 | Fine for body text |
| #5251B1 text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F8
oklch(93.7% 0.02 279.9)
-
Step 200
200
#D3D7F4
oklch(88.5% 0.04 279.3)
-
Step 300
300
#B7BCEF
oklch(80.9% 0.072 280.3)
-
Step 400
400
#9298E7
oklch(70.6% 0.115 279.7)
-
Step 500
500
#797DE0
oklch(63.2% 0.147 279.6)
-
Step 600
600
#6364CE
oklch(55.7% 0.16 279.5)
-
Step 700
700 (this color)
#5251B1
oklch(48.8% 0.149 279.8)
-
Step 800
800
#444490
oklch(42.8% 0.122 279.9)
-
Step 900
900
#383A73
oklch(37.7% 0.096 279.2)
-
Step 950
950
#212243
oklch(26.9% 0.061 280.2)
#5251B1 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) | #1860B4 | 0.063 |
| Deuteranopia (no green cones) | #0559AF | 0.066 |
| Tritanopia (no blue cones) | #286779 | 0.129 |
| Achromatopsia (no color) | #5D5D5D | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5251B1
#5251B1
oklch(48.8% 0.149 279.8)
- #6E6000
#6E6000
oklch(48.8% 0.101 99.3)
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 #5251B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.043
- Bluey Purple #6241C7 ΔE 0.054
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Blueberry #464196 ΔE 0.061
- Twilight #4E518B ΔE 0.062
- Slate Blue #6A5ACD ΔE 0.062
- Dusky Blue #475F94 ΔE 0.066
- Warm Blue #4B57DB ΔE 0.067
Use #5251B1 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.