#616DD1
Closest named color: Dark Periwinkle (#665FD1). oklch(57.5% 0.152 275.4), rgb(97, 109, 209).
Aa
Black text reads best on this color (4.61:1).
About this color
#616DD1 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.152 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.034 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #616DD1 |
| RGB | rgb(97, 109, 209) |
| HSL | hsl(234, 55%, 60%) |
| OKLCH | oklch(57.5% 0.152 275.4) |
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 #616DD1 | 4.54:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #616DD1 | 4.61:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #616DD1 text on white | 4.54:1 | AA | Lc 71.4 | Content text, not long reading |
| #616DD1 text on black | 4.61:1 | AA | Lc -30.3 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B3BEEE
oklch(80.9% 0.069 274.7)
-
Step 400
400
#8D9BE5
oklch(70.8% 0.109 275.1)
-
Step 500
500
#7280DD
oklch(63.1% 0.14 275.2)
-
Step 600
600 (this color)
#616DD1
oklch(57.5% 0.152 275.4)
-
Step 700
700
#4C55AF
oklch(49% 0.142 275.6)
-
Step 800
800
#3E468E
oklch(42.6% 0.118 275.5)
-
Step 900
900
#343C71
oklch(37.7% 0.091 274.8)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#616DD1 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) | #3E7BD5 | 0.047 |
| Deuteranopia (no green cones) | #3171CF | 0.050 |
| Tritanopia (no blue cones) | #2B8395 | 0.134 |
| Achromatopsia (no color) | #767676 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #616DD1
#616DD1
oklch(57.5% 0.152 275.4)
- #8E7700
#8E7700
oklch(57.4% 0.118 95.5)
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 #616DD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.034
- Slate Blue #6A5ACD ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.047
- Royal Blue #4169E1 ΔE 0.047
- Iris #6258C4 ΔE 0.053
- Medium Slate Blue #7B68EE ΔE 0.059
- Windows Blue #3778BF ΔE 0.061
- Cornflower #6A79F7 ΔE 0.064
Use #616DD1 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.