#5155AA
Closest named color: Iris (#6258C4). oklch(49% 0.133 278.2), rgb(81, 85, 170).
Aa
White text reads best on this color (6.50:1).
About this color
#5155AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.133 and its hue 278°. 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 6.50:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #5155AA |
| RGB | rgb(81, 85, 170) |
| HSL | hsl(237, 35%, 49%) |
| OKLCH | oklch(49% 0.133 278.2) |
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 #5155AA | 6.50:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #5155AA | 3.22:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #5155AA text on white | 6.50:1 | AA | Lc 82.0 | Fine for body text |
| #5155AA text on black | 3.22:1 | AA large text | Lc -19.9 | 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
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D3D7F1
oklch(88.4% 0.036 278.7)
-
Step 300
300
#B6BDEB
oklch(80.9% 0.065 278.1)
-
Step 400
400
#929AE0
oklch(70.7% 0.103 278.4)
-
Step 500
500
#787FD8
oklch(63% 0.133 278.4)
-
Step 600
600
#6267C5
oklch(55.6% 0.143 278.3)
-
Step 700
700 (this color)
#5155AA
oklch(49% 0.133 278.2)
-
Step 800
800
#42468A
oklch(42.6% 0.111 278.1)
-
Step 900
900
#383B6E
oklch(37.6% 0.086 278.8)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#5155AA 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) | #2D61AD | 0.047 |
| Deuteranopia (no green cones) | #235AA8 | 0.051 |
| Tritanopia (no blue cones) | #2B6877 | 0.118 |
| Achromatopsia (no color) | #5E5E5E | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5155AA
#5155AA
oklch(49% 0.133 278.2)
- #706000
#706000
oklch(49% 0.101 97.8)
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 #5155AA, 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 0.050
- Dusky Blue #475F94 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.053
- French Blue #436BAD ΔE 0.059
- Blueberry #464196 ΔE 0.062
- Mid Blue #276AB3 ΔE 0.065
- Dusk #4E5481 ΔE 0.067
Use #5155AA 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.