#603777
Closest named color: Dark Slate Blue (#483D8B). oklch(41.6% 0.111 312.1), rgb(96, 55, 119).
Aa
White text reads best on this color (9.09:1).
About this color
#603777 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.111 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.055 away. White text reads best on it, at 9.09:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.111) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.31:1 |
| White text | 9.09:1 |
Values
| HEX | #603777 |
| RGB | rgb(96, 55, 119) |
| HSL | hsl(278, 37%, 34%) |
| OKLCH | oklch(41.6% 0.111 312.1) |
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 #603777 | 9.09:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #603777 | 2.31:1 | Fails | Lc 13.3 | Not readable |
| #603777 text on white | 9.09:1 | AAA | Lc 90.6 | Preferred for body text |
| #603777 text on black | 2.31:1 | Fails | Lc -11.7 | 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
#EEE6F3
oklch(93.5% 0.019 312.8)
-
Step 200
200
#E1D3EB
oklch(88.5% 0.036 311.4)
-
Step 300
300
#CFB5E0
oklch(80.9% 0.066 311.9)
-
Step 400
400
#B68DD0
oklch(70.6% 0.105 311.7)
-
Step 500
500
#A470C3
oklch(63.1% 0.132 311.9)
-
Step 600
600
#8F56B0
oklch(55.5% 0.146 311.8)
-
Step 700
700
#7A4697
oklch(49.1% 0.135 312.1)
-
Step 800
800 (this color)
#603777
oklch(41.6% 0.111 312.1)
-
Step 900
900
#513262
oklch(37.6% 0.087 312.6)
-
Step 950
950
#2F1E3A
oklch(27% 0.055 311.1)
#603777 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) | #274679 | 0.094 |
| Deuteranopia (no green cones) | #344975 | 0.083 |
| Tritanopia (no blue cones) | #5E4151 | 0.076 |
| Achromatopsia (no color) | #484848 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603777
#603777
oklch(41.6% 0.111 312.1)
- #345807
#345807
oklch(41.7% 0.111 132.1)
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 #603777, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Rebecca Purple #663399 ΔE 0.058
- Blueberry #464196 ΔE 0.070
- Twilight #4E518B ΔE 0.074
- Dusk #4E5481 ΔE 0.080
- Dusty Grape #545775 ΔE 0.090
- Grape Purple #5D1451 ΔE 0.090
- Light Eggplant #894585 ΔE 0.091
Use #603777 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.