#7557CB
Closest named color: Light Indigo (#6D5ACF). oklch(54.7% 0.172 291.6), rgb(117, 87, 203).
Aa
White text reads best on this color (5.27:1).
About this color
#7557CB is a medium-dark, vivid purple. In OKLCH its lightness is 55%, its chroma 0.172 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Indigo (#6D5ACF), ΔE 0.015 away. White text reads best on it, at 5.27:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Light Indigo (#6D5ACF) |
| Black text | 3.98:1 |
| White text | 5.27:1 |
Values
| HEX | #7557CB |
| RGB | rgb(117, 87, 203) |
| HSL | hsl(256, 53%, 57%) |
| OKLCH | oklch(54.7% 0.172 291.6) |
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 #7557CB | 5.27:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #7557CB | 3.98:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #7557CB text on white | 5.27:1 | AA | Lc 75.9 | Fine for body text |
| #7557CB text on black | 3.98:1 | AA large text | Lc -25.9 | 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 600.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE8F8
oklch(93.7% 0.022 291.7)
-
Step 200
200
#D9D5F4
oklch(88.6% 0.042 291.4)
-
Step 300
300
#C1B8EF
oklch(80.9% 0.077 292.1)
-
Step 400
400
#A292E8
oklch(70.8% 0.124 291.4)
-
Step 500
500
#8C74E0
oklch(63% 0.158 291.4)
-
Step 600
600 (this color)
#7557CB
oklch(54.7% 0.172 291.6)
-
Step 700
700
#6549B2
oklch(49.1% 0.16 291.7)
-
Step 800
800
#523D90
oklch(42.7% 0.132 291.5)
-
Step 900
900
#443573
oklch(37.8% 0.103 291.9)
-
Step 950
950
#271F43
oklch(26.9% 0.065 291.6)
#7557CB 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) | #106ECF | 0.108 |
| Deuteranopia (no green cones) | #1B69C8 | 0.104 |
| Tritanopia (no blue cones) | #5D7089 | 0.139 |
| Achromatopsia (no color) | #6C6C6C | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #7557CB
#7557CB
oklch(54.7% 0.172 291.6)
- #737700
#737700
oklch(54.7% 0.121 112.1)
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 #7557CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Indigo #6D5ACF ΔE 0.015
- Slate Blue #6A5ACD ΔE 0.018
- Dark Periwinkle #665FD1 ΔE 0.029
- Iris #6258C4 ΔE 0.032
- Purpley #8756E4 ΔE 0.048
- Deep Lavender #8D5EB7 ΔE 0.057
- Bluey Purple #6241C7 ΔE 0.061
- Medium Slate Blue #7B68EE ΔE 0.065
Use #7557CB 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.