#635FBB
Closest named color: Iris (#6258C4). oklch(53.5% 0.14 282.5), rgb(99, 95, 187).
Aa
White text reads best on this color (5.40:1).
About this color
#635FBB is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.140 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.024 away. White text reads best on it, at 5.40:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #635FBB |
| RGB | rgb(99, 95, 187) |
| HSL | hsl(243, 40%, 55%) |
| OKLCH | oklch(53.5% 0.14 282.5) |
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 #635FBB | 5.40:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #635FBB | 3.88:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #635FBB text on white | 5.40:1 | AA | Lc 76.8 | Fine for body text |
| #635FBB text on black | 3.88:1 | AA large text | Lc -25.0 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F6
oklch(93.7% 0.018 282.5)
-
Step 200
200
#D5D7F0
oklch(88.5% 0.034 282)
-
Step 300
300
#BABCE9
oklch(80.9% 0.063 282.9)
-
Step 400
400
#9799DE
oklch(70.8% 0.1 282.2)
-
Step 500
500
#7F7ED5
oklch(63.2% 0.129 282.6)
-
Step 600
600 (this color)
#635FBB
oklch(53.5% 0.14 282.5)
-
Step 700
700
#5854A8
oklch(49.2% 0.131 282.6)
-
Step 800
800
#474588
oklch(42.7% 0.108 282.1)
-
Step 900
900
#3C3A6D
oklch(37.7% 0.086 283.3)
-
Step 950
950
#232340
oklch(27.2% 0.053 282.3)
#635FBB 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) | #376DBE | 0.059 |
| Deuteranopia (no green cones) | #3167B9 | 0.060 |
| Tritanopia (no blue cones) | #457384 | 0.121 |
| Achromatopsia (no color) | #6A6A6A | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #635FBB
#635FBB
oklch(53.5% 0.14 282.5)
- #7A6F00
#7A6F00
oklch(53.5% 0.112 102.6)
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 #635FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.024
- Slate Blue #6A5ACD ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.035
- Light Indigo #6D5ACF ΔE 0.037
- French Blue #436BAD ΔE 0.056
- Warm Blue #4B57DB ΔE 0.065
- Deep Lavender #8D5EB7 ΔE 0.069
- Mid Blue #276AB3 ΔE 0.071
Use #635FBB 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.