#603F7B
Closest named color: Dark Slate Blue (#483D8B). oklch(43.2% 0.102 308.1), rgb(96, 63, 123).
Aa
White text reads best on this color (8.41:1).
About this color
#603F7B is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.102 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 8.41:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.102) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.49:1 |
| White text | 8.41:1 |
Values
| HEX | #603F7B |
| RGB | rgb(96, 63, 123) |
| HSL | hsl(273, 32%, 36%) |
| OKLCH | oklch(43.2% 0.102 308.1) |
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 #603F7B | 8.41:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #603F7B | 2.49:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #603F7B text on white | 8.41:1 | AAA | Lc 88.8 | Fine for body text |
| #603F7B text on black | 2.49:1 | Fails | Lc -13.4 | Not readable |
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 800.
-
Step 50
50
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DFD4EA
oklch(88.5% 0.032 308.1)
-
Step 300
300
#CBB7DF
oklch(80.9% 0.059 307.6)
-
Step 400
400
#B190CF
oklch(70.6% 0.097 308)
-
Step 500
500
#9E74C2
oklch(63.1% 0.122 308)
-
Step 600
600
#895BAE
oklch(55.6% 0.133 308.2)
-
Step 700
700
#744B96
oklch(49.2% 0.123 307.7)
-
Step 800
800 (this color)
#603F7B
oklch(43.2% 0.102 308.1)
-
Step 900
900
#4D3562
oklch(37.7% 0.079 307.6)
-
Step 950
950
#2D1F39
oklch(26.9% 0.05 308.1)
#603F7B 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) | #304C7D | 0.078 |
| Deuteranopia (no green cones) | #394E79 | 0.072 |
| Tritanopia (no blue cones) | #5C4957 | 0.074 |
| Achromatopsia (no color) | #4D4D4D | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603F7B
#603F7B
oklch(43.2% 0.102 308.1)
- #405A12
#405A12
oklch(43.1% 0.101 127.8)
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 #603F7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Twilight #4E518B ΔE 0.056
- Rebecca Purple #663399 ΔE 0.060
- Dusk #4E5481 ΔE 0.061
- Blueberry #464196 ΔE 0.063
- Dusty Grape #545775 ΔE 0.072
- Light Eggplant #894585 ΔE 0.082
- YInMn Blue #415A77 ΔE 0.088
Use #603F7B 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.