#6351CB
Closest named color: Iris (#6258C4). oklch(52.1% 0.181 284.9), rgb(99, 81, 203).
Aa
White text reads best on this color (5.88:1).
About this color
#6351CB is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.181 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.020 away. White text reads best on it, at 5.88:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #6351CB |
| RGB | rgb(99, 81, 203) |
| HSL | hsl(249, 54%, 56%) |
| OKLCH | oklch(52.1% 0.181 284.9) |
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 #6351CB | 5.88:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #6351CB | 3.56:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #6351CB text on white | 5.88:1 | AA | Lc 79.0 | Fine for body text |
| #6351CB text on black | 3.56:1 | AA large text | Lc -22.8 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D5D5F9
oklch(88.4% 0.049 285.3)
-
Step 300
300
#BAB9F8
oklch(80.9% 0.088 285)
-
Step 400
400
#9892F4
oklch(70.6% 0.141 285)
-
Step 500
500
#8174F0
oklch(63.1% 0.18 284.8)
-
Step 600
600
#6D59DE
oklch(55.7% 0.194 285)
-
Step 700
700 (this color)
#6351CB
oklch(52.1% 0.181 284.9)
-
Step 800
800
#4A3C9C
oklch(42.7% 0.15 284.8)
-
Step 900
900
#3D347C
oklch(37.6% 0.118 284.9)
-
Step 950
950
#241F49
oklch(27% 0.075 285.6)
#6351CB 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) | #0068CF | 0.091 |
| Deuteranopia (no green cones) | #0061C8 | 0.089 |
| Tritanopia (no blue cones) | #3B6E86 | 0.153 |
| Achromatopsia (no color) | #646464 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6351CB
#6351CB
oklch(52.1% 0.181 284.9)
- #736C00
#736C00
oklch(52.1% 0.111 105.1)
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 #6351CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.020
- Slate Blue #6A5ACD ΔE 0.025
- Light Indigo #6D5ACF ΔE 0.028
- Dark Periwinkle #665FD1 ΔE 0.034
- Bluey Purple #6241C7 ΔE 0.034
- Warm Blue #4B57DB ΔE 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Blurple #5539CC ΔE 0.057
Use #6351CB 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.