#6659B4
Closest named color: Iris (#6258C4). oklch(52.1% 0.139 287.1), rgb(102, 89, 180).
Aa
White text reads best on this color (5.74:1).
About this color
#6659B4 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 52%, its chroma 0.139 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.026 away. White text reads best on it, at 5.74:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.65:1 |
| White text | 5.74:1 |
Values
| HEX | #6659B4 |
| RGB | rgb(102, 89, 180) |
| HSL | hsl(249, 38%, 53%) |
| OKLCH | oklch(52.1% 0.139 287.1) |
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 #6659B4 | 5.74:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #6659B4 | 3.65:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #6659B4 text on white | 5.74:1 | AA | Lc 78.6 | Fine for body text |
| #6659B4 text on black | 3.65:1 | AA large text | Lc -23.2 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D7D6F1
oklch(88.5% 0.037 287.3)
-
Step 300
300
#BDBBEB
oklch(81% 0.067 286.7)
-
Step 400
400
#9C96E0
oklch(70.7% 0.107 287)
-
Step 500
500
#857AD8
oklch(63.1% 0.138 287.1)
-
Step 600
600
#7061C5
oklch(55.6% 0.15 287.4)
-
Step 700
700 (this color)
#6659B4
oklch(52.1% 0.139 287.1)
-
Step 800
800
#4C428A
oklch(42.7% 0.115 286.8)
-
Step 900
900
#3F386E
oklch(37.6% 0.09 287.2)
-
Step 950
950
#252141
oklch(27% 0.058 287.5)
#6659B4 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) | #3268B7 | 0.069 |
| Deuteranopia (no green cones) | #3163B2 | 0.068 |
| Tritanopia (no blue cones) | #4F6C7E | 0.116 |
| Achromatopsia (no color) | #666666 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6659B4
#6659B4
oklch(52.1% 0.139 287.1)
- #716D00
#716D00
oklch(52.1% 0.112 107.2)
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 #6659B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.026
- Slate Blue #6A5ACD ΔE 0.039
- Light Indigo #6D5ACF ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.046
- Bluey Purple #6241C7 ΔE 0.065
- French Blue #436BAD ΔE 0.065
- Deep Lavender #8D5EB7 ΔE 0.068
- Dusky Blue #475F94 ΔE 0.072
Use #6659B4 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.