#606FC9
Closest named color: Dark Periwinkle (#665FD1). oklch(57.3% 0.139 274.1), rgb(96, 111, 201).
Aa
Black text reads best on this color (4.61:1).
About this color
#606FC9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.139 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.043 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.61:1 |
| White text | 4.55:1 |
Values
| HEX | #606FC9 |
| RGB | rgb(96, 111, 201) |
| HSL | hsl(231, 49%, 58%) |
| OKLCH | oklch(57.3% 0.139 274.1) |
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 #606FC9 | 4.55:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #606FC9 | 4.61:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #606FC9 text on white | 4.55:1 | AA | Lc 71.4 | Content text, not long reading |
| #606FC9 text on black | 4.61:1 | AA | Lc -30.2 | Non-text elements, placeholder text |
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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B4BEEA
oklch(80.9% 0.063 274.9)
-
Step 400
400
#8D9CDF
oklch(70.7% 0.1 273.9)
-
Step 500
500
#7282D6
oklch(63.1% 0.128 274)
-
Step 600
600 (this color)
#606FC9
oklch(57.3% 0.139 274.1)
-
Step 700
700
#4B58A9
oklch(49.1% 0.129 273.8)
-
Step 800
800
#3E4889
oklch(42.7% 0.108 274.4)
-
Step 900
900
#343D6D
oklch(37.7% 0.083 273.8)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#606FC9 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) | #487ACC | 0.036 |
| Deuteranopia (no green cones) | #3D72C7 | 0.039 |
| Tritanopia (no blue cones) | #318292 | 0.122 |
| Achromatopsia (no color) | #767676 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #606FC9
#606FC9
oklch(57.3% 0.139 274.1)
- #8F7600
#8F7600
oklch(57.3% 0.117 94.1)
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 #606FC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.043
- Windows Blue #3778BF ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.055
- Royal Blue #4169E1 ΔE 0.056
- Iris #6258C4 ΔE 0.057
- French Blue #436BAD ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.070
Use #606FC9 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.