#5F70D1
Closest named color: Dark Periwinkle (#665FD1). oklch(57.9% 0.149 273.4), rgb(95, 112, 209).
Aa
Black text reads best on this color (4.72:1).
About this color
#5F70D1 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.149 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.042 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #5F70D1 |
| RGB | rgb(95, 112, 209) |
| HSL | hsl(231, 55%, 60%) |
| OKLCH | oklch(57.9% 0.149 273.4) |
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 #5F70D1 | 4.44:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #5F70D1 | 4.72:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #5F70D1 text on white | 4.44:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #5F70D1 text on black | 4.72:1 | AA | Lc -31.0 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEED
oklch(80.8% 0.068 273.6)
-
Step 400
400
#8B9CE4
oklch(70.8% 0.107 273.2)
-
Step 500
500
#6F81DC
oklch(63% 0.138 273.4)
-
Step 600
600 (this color)
#5F70D1
oklch(57.9% 0.149 273.4)
-
Step 700
700
#4957AE
oklch(49.1% 0.138 273.4)
-
Step 800
800
#3C478D
oklch(42.6% 0.116 273.8)
-
Step 900
900
#333D71
oklch(37.9% 0.089 273.2)
-
Step 950
950
#1E2442
oklch(27.1% 0.056 273.5)
#5F70D1 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) | #447DD5 | 0.041 |
| Deuteranopia (no green cones) | #3573CF | 0.043 |
| Tritanopia (no blue cones) | #248596 | 0.132 |
| Achromatopsia (no color) | #787878 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F70D1
#5F70D1
oklch(57.9% 0.149 273.4)
- #927700
#927700
oklch(57.8% 0.118 93)
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 #5F70D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.042
- Royal Blue #4169E1 ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.055
- Windows Blue #3778BF ΔE 0.055
- Iris #6258C4 ΔE 0.060
- Cornflower #6A79F7 ΔE 0.062
- Medium Slate Blue #7B68EE ΔE 0.063
Use #5F70D1 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.