#6557A1
Closest named color: Dusky Blue (#475F94). oklch(50.5% 0.115 290.4), rgb(101, 87, 161).
Aa
White text reads best on this color (6.12:1).
About this color
#6557A1 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.115 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.053 away. White text reads best on it, at 6.12:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.43:1 |
| White text | 6.12:1 |
Values
| HEX | #6557A1 |
| RGB | rgb(101, 87, 161) |
| HSL | hsl(251, 30%, 49%) |
| OKLCH | oklch(50.5% 0.115 290.4) |
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 #6557A1 | 6.12:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #6557A1 | 3.43:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #6557A1 text on white | 6.12:1 | AA | Lc 80.4 | Fine for body text |
| #6557A1 text on black | 3.43:1 | AA large text | Lc -21.4 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D6ED
oklch(88.5% 0.031 289.7)
-
Step 300
300
#C0BBE3
oklch(80.9% 0.056 290.8)
-
Step 400
400
#A097D5
oklch(70.7% 0.09 290.6)
-
Step 500
500
#897CC9
oklch(63% 0.114 290.5)
-
Step 600
600
#7464B6
oklch(55.5% 0.125 290.7)
-
Step 700
700 (this color)
#6557A1
oklch(50.5% 0.115 290.4)
-
Step 800
800
#4F447F
oklch(42.6% 0.096 290.3)
-
Step 900
900
#423A66
oklch(37.8% 0.074 290.8)
-
Step 950
950
#26223C
oklch(27% 0.048 289.9)
#6557A1 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) | #3D63A4 | 0.059 |
| Deuteranopia (no green cones) | #3E609F | 0.057 |
| Tritanopia (no blue cones) | #566574 | 0.095 |
| Achromatopsia (no color) | #626262 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6557A1
#6557A1
oklch(50.5% 0.115 290.4)
- #696900
#696900
oklch(50.4% 0.11 109.8)
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 #6557A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.053
- Twilight #4E518B ΔE 0.053
- Iris #6258C4 ΔE 0.055
- Dusk #4E5481 ΔE 0.064
- French Blue #436BAD ΔE 0.065
- Muted Purple #805B87 ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.065
- Slate Blue #6A5ACD ΔE 0.069
Use #6557A1 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.