#5B61D9
Closest named color: Dark Periwinkle (#665FD1). oklch(55.3% 0.18 276.6), rgb(91, 97, 217).
Aa
White text reads best on this color (5.05:1).
About this color
#5B61D9 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.180 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.020 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #5B61D9 |
| RGB | rgb(91, 97, 217) |
| HSL | hsl(237, 62%, 60%) |
| OKLCH | oklch(55.3% 0.18 276.6) |
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 #5B61D9 | 5.05:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #5B61D9 | 4.15:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #5B61D9 text on white | 5.05:1 | AA | Lc 74.5 | Content text, not long reading |
| #5B61D9 text on black | 4.15:1 | AA large text | Lc -27.2 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B2BDF5
oklch(80.9% 0.08 275.8)
-
Step 400
400
#8C98F1
oklch(70.7% 0.13 276.7)
-
Step 500
500
#717CEC
oklch(63.1% 0.166 276.3)
-
Step 600
600 (this color)
#5B61D9
oklch(55.3% 0.18 276.6)
-
Step 700
700
#4C50BD
oklch(49.1% 0.168 276.7)
-
Step 800
800
#3E4299
oklch(42.6% 0.14 276.7)
-
Step 900
900
#34397A
oklch(37.7% 0.109 276.5)
-
Step 950
950
#1E2247
oklch(27% 0.068 276.2)
#5B61D9 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) | #0074DD | 0.071 |
| Deuteranopia (no green cones) | #0069D7 | 0.066 |
| Tritanopia (no blue cones) | #007D94 | 0.157 |
| Achromatopsia (no color) | #6F6F6F | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B61D9
#5B61D9
oklch(55.3% 0.18 276.6)
- #867200
#867200
oklch(55.4% 0.114 96.9)
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 #5B61D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.020
- Slate Blue #6A5ACD ΔE 0.031
- Light Indigo #6D5ACF ΔE 0.032
- Warm Blue #4B57DB ΔE 0.034
- Royal Blue #4169E1 ΔE 0.034
- Iris #6258C4 ΔE 0.038
- Neon Blue #4361EE ΔE 0.043
- Medium Slate Blue #7B68EE ΔE 0.060
Use #5B61D9 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.