#6066CB
Closest named color: Dark Periwinkle (#665FD1). oklch(55.6% 0.154 277.6), rgb(96, 102, 203).
Aa
White text reads best on this color (4.92:1).
About this color
#6066CB is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.154 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.021 away. White text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.26:1 |
| White text | 4.92:1 |
Values
| HEX | #6066CB |
| RGB | rgb(96, 102, 203) |
| HSL | hsl(237, 51%, 59%) |
| OKLCH | oklch(55.6% 0.154 277.6) |
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 #6066CB | 4.92:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #6066CB | 4.26:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #6066CB text on white | 4.92:1 | AA | Lc 73.9 | Content text, not long reading |
| #6066CB text on black | 4.26:1 | AA large text | Lc -27.8 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D7F3
oklch(88.4% 0.039 277.6)
-
Step 300
300
#B5BDEE
oklch(80.9% 0.07 277.5)
-
Step 400
400
#909AE5
oklch(70.8% 0.11 277.4)
-
Step 500
500
#767FDD
oklch(63.2% 0.14 277.4)
-
Step 600
600 (this color)
#6066CB
oklch(55.6% 0.154 277.6)
-
Step 700
700
#4F54AF
oklch(49% 0.142 277.4)
-
Step 800
800
#41458E
oklch(42.6% 0.119 277.7)
-
Step 900
900
#373B71
oklch(37.7% 0.091 277.9)
-
Step 950
950
#202342
oklch(27% 0.057 277.6)
#6066CB 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) | #3575CF | 0.055 |
| Deuteranopia (no green cones) | #286CC9 | 0.058 |
| Tritanopia (no blue cones) | #307C8F | 0.134 |
| Achromatopsia (no color) | #707070 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6066CB
#6066CB
oklch(55.6% 0.154 277.6)
- #867300
#867300
oklch(55.7% 0.115 97.6)
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 #6066CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.021
- Slate Blue #6A5ACD ΔE 0.031
- Light Indigo #6D5ACF ΔE 0.034
- Iris #6258C4 ΔE 0.035
- Royal Blue #4169E1 ΔE 0.048
- Warm Blue #4B57DB ΔE 0.056
- French Blue #436BAD ΔE 0.063
- Windows Blue #3778BF ΔE 0.066
Use #6066CB 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.