#5D5FDB
Closest named color: Dark Periwinkle (#665FD1). oklch(55.3% 0.185 277.8), rgb(93, 95, 219).
Aa
White text reads best on this color (5.09:1).
About this color
#5D5FDB is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.185 and its hue 278°. 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 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #5D5FDB |
| RGB | rgb(93, 95, 219) |
| HSL | hsl(239, 64%, 61%) |
| OKLCH | oklch(55.3% 0.185 277.8) |
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 #5D5FDB | 5.09:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #5D5FDB | 4.12:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #5D5FDB text on white | 5.09:1 | AA | Lc 74.8 | Content text, not long reading |
| #5D5FDB text on black | 4.12:1 | AA large text | Lc -27.0 | 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
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B3BCF7
oklch(80.9% 0.084 277.6)
-
Step 400
400
#8D97F2
oklch(70.6% 0.133 277.7)
-
Step 500
500
#737AEE
oklch(63% 0.171 277.7)
-
Step 600
600 (this color)
#5D5FDB
oklch(55.3% 0.185 277.8)
-
Step 700
700
#4E4EBF
oklch(49% 0.173 277.9)
-
Step 800
800
#40419B
oklch(42.8% 0.143 278)
-
Step 900
900
#35387B
oklch(37.6% 0.112 277.7)
-
Step 950
950
#1F2148
oklch(26.9% 0.071 278.2)
#5D5FDB 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) | #0073DF | 0.074 |
| Deuteranopia (no green cones) | #0069D8 | 0.070 |
| Tritanopia (no blue cones) | #077C94 | 0.161 |
| Achromatopsia (no color) | #6E6E6E | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5D5FDB
#5D5FDB
oklch(55.3% 0.185 277.8)
- #857200
#857200
oklch(55.3% 0.114 97.5)
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 #5D5FDB, 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 0.029
- Light Indigo #6D5ACF ΔE 0.030
- Warm Blue #4B57DB ΔE 0.033
- Royal Blue #4169E1 ΔE 0.038
- Iris #6258C4 ΔE 0.038
- Neon Blue #4361EE ΔE 0.042
- Medium Slate Blue #7B68EE ΔE 0.059
Use #5D5FDB 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.