#5B6FDC
Closest named color: Royal Blue (#4169E1). oklch(58.2% 0.167 272.4), rgb(91, 111, 220).
Aa
Black text reads best on this color (4.75:1).
About this color
#5B6FDC is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.167 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #5B6FDC |
| RGB | rgb(91, 111, 220) |
| HSL | hsl(231, 65%, 61%) |
| OKLCH | oklch(58.2% 0.167 272.4) |
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 #5B6FDC | 4.41:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #5B6FDC | 4.75:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #5B6FDC text on white | 4.41:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #5B6FDC text on black | 4.75:1 | AA | Lc -31.3 | 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#B0BEF2
oklch(80.9% 0.075 272.9)
-
Step 400
400
#879BEB
oklch(70.7% 0.12 272.3)
-
Step 500
500
#6B80E5
oklch(63.1% 0.153 272.5)
-
Step 600
600 (this color)
#5B6FDC
oklch(58.2% 0.167 272.4)
-
Step 700
700
#4555B7
oklch(49.1% 0.155 272.4)
-
Step 800
800
#384694
oklch(42.7% 0.128 272.2)
-
Step 900
900
#303C76
oklch(37.8% 0.1 272)
-
Step 950
950
#1C2345
oklch(26.9% 0.064 272.7)
#5B6FDC 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) | #367EE0 | 0.047 |
| Deuteranopia (no green cones) | #1D73DA | 0.052 |
| Tritanopia (no blue cones) | #00889B | 0.146 |
| Achromatopsia (no color) | #787878 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6FDC
#5B6FDC
oklch(58.2% 0.167 272.4)
- #947800
#947800
oklch(58.3% 0.119 92.5)
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 #5B6FDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.041
- Cornflower #6A79F7 ΔE 0.051
- Medium Slate Blue #7B68EE ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.055
- Neon Blue #4361EE ΔE 0.055
- Iris #6258C4 ΔE 0.063
Use #5B6FDC 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.