#6171CD
Closest named color: Dark Periwinkle (#665FD1). oklch(58% 0.142 273.8), rgb(97, 113, 205).
Aa
Black text reads best on this color (4.75:1).
About this color
#6171CD is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.142 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.046 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #6171CD |
| RGB | rgb(97, 113, 205) |
| HSL | hsl(231, 52%, 59%) |
| OKLCH | oklch(58% 0.142 273.8) |
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 #6171CD | 4.41:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #6171CD | 4.75:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #6171CD text on white | 4.41:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #6171CD text on black | 4.75:1 | AA | Lc -31.2 | 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
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B3BEEB
oklch(80.8% 0.065 274.1)
-
Step 400
400
#8C9CE0
oklch(70.7% 0.101 273.4)
-
Step 500
500
#7182D8
oklch(63.1% 0.131 273.6)
-
Step 600
600 (this color)
#6171CD
oklch(58% 0.142 273.8)
-
Step 700
700
#4A58AA
oklch(49.1% 0.131 273.3)
-
Step 800
800
#3D488A
oklch(42.7% 0.109 273.8)
-
Step 900
900
#343D6E
oklch(37.7% 0.084 273.8)
-
Step 950
950
#1E2441
oklch(27% 0.055 273.4)
#6171CD 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) | #497DD0 | 0.038 |
| Deuteranopia (no green cones) | #3D74CB | 0.039 |
| Tritanopia (no blue cones) | #2F8595 | 0.126 |
| Achromatopsia (no color) | #787878 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6171CD
#6171CD
oklch(58% 0.142 273.8)
- #927800
#927800
oklch(58% 0.119 93.7)
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 #6171CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.046
- Windows Blue #3778BF ΔE 0.053
- Royal Blue #4169E1 ΔE 0.055
- Slate Blue #6A5ACD ΔE 0.057
- Light Indigo #6D5ACF ΔE 0.058
- Iris #6258C4 ΔE 0.063
- French Blue #436BAD ΔE 0.065
- Cornflower #6A79F7 ΔE 0.066
Use #6171CD 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.