#634ECC
Closest named color: Iris (#6258C4). oklch(51.7% 0.187 285.5), rgb(99, 78, 204).
Aa
White text reads best on this color (6.01:1).
About this color
#634ECC is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.187 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.027 away. White text reads best on it, at 6.01:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.49:1 |
| White text | 6.01:1 |
Values
| HEX | #634ECC |
| RGB | rgb(99, 78, 204) |
| HSL | hsl(250, 55%, 55%) |
| OKLCH | oklch(51.7% 0.187 285.5) |
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 #634ECC | 6.01:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #634ECC | 3.49:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #634ECC text on white | 6.01:1 | AA | Lc 79.6 | Fine for body text |
| #634ECC text on black | 3.49:1 | AA large text | Lc -22.2 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D5D5FA
oklch(88.5% 0.051 285.3)
-
Step 300
300
#BAB9F9
oklch(80.9% 0.09 284.9)
-
Step 400
400
#9991F6
oklch(70.6% 0.145 285.7)
-
Step 500
500
#8272F2
oklch(63% 0.185 285.5)
-
Step 600
600
#6E57E1
oklch(55.7% 0.201 285.5)
-
Step 700
700 (this color)
#634ECC
oklch(51.7% 0.187 285.5)
-
Step 800
800
#4B3A9E
oklch(42.7% 0.155 285.5)
-
Step 900
900
#3E347D
oklch(37.8% 0.119 285.4)
-
Step 950
950
#241F49
oklch(27% 0.075 285.6)
#634ECC 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) | #0066D0 | 0.093 |
| Deuteranopia (no green cones) | #005FC9 | 0.090 |
| Tritanopia (no blue cones) | #3A6C86 | 0.155 |
| Achromatopsia (no color) | #636363 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634ECC
#634ECC
oklch(51.7% 0.187 285.5)
- #716B00
#716B00
oklch(51.7% 0.11 105.8)
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 #634ECC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.027
- Bluey Purple #6241C7 ΔE 0.028
- Slate Blue #6A5ACD ΔE 0.031
- Light Indigo #6D5ACF ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.040
- Warm Blue #4B57DB ΔE 0.044
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Blurple #5539CC ΔE 0.051
Use #634ECC 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.