#5B6DDF
Closest named color: Royal Blue (#4169E1). oklch(58% 0.173 273.1), rgb(91, 109, 223).
Aa
Black text reads best on this color (4.69:1).
About this color
#5B6DDF is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.173 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.033 away. Black text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.69:1 |
| White text | 4.47:1 |
Values
| HEX | #5B6DDF |
| RGB | rgb(91, 109, 223) |
| HSL | hsl(232, 67%, 62%) |
| OKLCH | oklch(58% 0.173 273.1) |
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 #5B6DDF | 4.47:1 | AA large text | Lc -76.2 | Fine for body text |
| Black text on #5B6DDF | 4.69:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #5B6DDF text on white | 4.47:1 | AA large text | Lc 70.7 | Content text, not long reading |
| #5B6DDF text on black | 4.69:1 | AA | Lc -30.9 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F7
oklch(88.5% 0.044 272.7)
-
Step 300
300
#B0BEF4
oklch(81% 0.078 273.3)
-
Step 400
400
#879AEE
oklch(70.6% 0.125 273.1)
-
Step 500
500
#6B7FE9
oklch(63.1% 0.16 273)
-
Step 600
600 (this color)
#5B6DDF
oklch(58% 0.173 273.1)
-
Step 700
700
#4554BA
oklch(49.2% 0.16 272.8)
-
Step 800
800
#394597
oklch(42.7% 0.134 273.1)
-
Step 900
900
#303B78
oklch(37.7% 0.104 272.8)
-
Step 950
950
#1C2346
oklch(27% 0.065 272.8)
#5B6DDF 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) | #2D7DE3 | 0.052 |
| Deuteranopia (no green cones) | #0672DD | 0.059 |
| Tritanopia (no blue cones) | #00879C | 0.150 |
| Achromatopsia (no color) | #777777 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6DDF
#5B6DDF
oklch(58% 0.173 273.1)
- #937800
#937800
oklch(58.1% 0.119 93.1)
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 #5B6DDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.039
- Neon Blue #4361EE ΔE 0.049
- Cornflower #6A79F7 ΔE 0.050
- Medium Slate Blue #7B68EE ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.052
- Light Indigo #6D5ACF ΔE 0.052
- Warm Blue #4B57DB ΔE 0.059
Use #5B6DDF 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.