#605FDB
Closest named color: Dark Periwinkle (#665FD1). oklch(55.5% 0.185 278.9), rgb(96, 95, 219).
Aa
White text reads best on this color (5.05:1).
About this color
#605FDB is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.185 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.018 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #605FDB |
| RGB | rgb(96, 95, 219) |
| HSL | hsl(240, 63%, 62%) |
| OKLCH | oklch(55.5% 0.185 278.9) |
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 #605FDB | 5.05:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #605FDB | 4.15:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #605FDB text on white | 5.05:1 | AA | Lc 74.5 | Content text, not long reading |
| #605FDB text on black | 4.15:1 | AA large text | Lc -27.2 | 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 600.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F8
oklch(88.6% 0.046 278.6)
-
Step 300
300
#B4BCF6
oklch(80.9% 0.082 278.3)
-
Step 400
400
#8F97F2
oklch(70.8% 0.133 278.6)
-
Step 500
500
#767AED
oklch(63.2% 0.169 278.9)
-
Step 600
600 (this color)
#605FDB
oklch(55.5% 0.185 278.9)
-
Step 700
700
#504EBE
oklch(49.1% 0.171 278.8)
-
Step 800
800
#41419A
oklch(42.8% 0.142 278.6)
-
Step 900
900
#37387A
oklch(37.7% 0.11 279.1)
-
Step 950
950
#202148
oklch(27% 0.071 279.4)
#605FDB 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) | #0074DF | 0.078 |
| Deuteranopia (no green cones) | #006AD8 | 0.074 |
| Tritanopia (no blue cones) | #1C7C94 | 0.160 |
| Achromatopsia (no color) | #6F6F6F | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #605FDB
#605FDB
oklch(55.5% 0.185 278.9)
- #847300
#847300
oklch(55.5% 0.115 98.9)
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 #605FDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.018
- Slate Blue #6A5ACD ΔE 0.027
- Light Indigo #6D5ACF ΔE 0.028
- Warm Blue #4B57DB ΔE 0.036
- Iris #6258C4 ΔE 0.038
- Royal Blue #4169E1 ΔE 0.041
- Neon Blue #4361EE ΔE 0.045
- Medium Slate Blue #7B68EE ΔE 0.055
Use #605FDB 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.