#5153AB
Closest named color: Iris (#6258C4). oklch(48.7% 0.138 279), rgb(81, 83, 171).
Aa
White text reads best on this color (6.61:1).
About this color
#5153AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.138 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.049 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #5153AB |
| RGB | rgb(81, 83, 171) |
| HSL | hsl(239, 36%, 49%) |
| OKLCH | oklch(48.7% 0.138 279) |
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 #5153AB | 6.61:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #5153AB | 3.17:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #5153AB text on white | 6.61:1 | AA | Lc 82.5 | Fine for body text |
| #5153AB 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
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D3D7F2
oklch(88.4% 0.037 278.9)
-
Step 300
300
#B7BDEC
oklch(81% 0.067 279.1)
-
Step 400
400
#9299E2
oklch(70.6% 0.107 279.1)
-
Step 500
500
#797FDA
oklch(63.2% 0.136 278.9)
-
Step 600
600
#6366C7
oklch(55.6% 0.147 279.1)
-
Step 700
700 (this color)
#5153AB
oklch(48.7% 0.138 279)
-
Step 800
800
#43458C
oklch(42.7% 0.115 279.1)
-
Step 900
900
#383B70
oklch(37.7% 0.089 278.7)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#5153AB 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) | #2760AE | 0.052 |
| Deuteranopia (no green cones) | #1C59A9 | 0.056 |
| Tritanopia (no blue cones) | #2B6677 | 0.119 |
| Achromatopsia (no color) | #5D5D5D | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5153AB
#5153AB
oklch(48.7% 0.138 279)
- #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 #5153AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.049
- Twilight #4E518B ΔE 0.052
- Dusky Blue #475F94 ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.056
- Blueberry #464196 ΔE 0.059
- French Blue #436BAD ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.065
- Blue With A Hint Of Purple #533CC6 ΔE 0.068
Use #5153AB 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.