#5B6FAC
Closest named color: French Blue (#436BAD). oklch(55.3% 0.098 269.2), rgb(91, 111, 172).
Aa
White text reads best on this color (4.86:1).
About this color
#5B6FAC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.098 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.032 away. White text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #5B6FAC |
| RGB | rgb(91, 111, 172) |
| HSL | hsl(225, 33%, 52%) |
| OKLCH | oklch(55.3% 0.098 269.2) |
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 #5B6FAC | 4.86:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #5B6FAC | 4.31:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #5B6FAC text on white | 4.86:1 | AA | Lc 73.7 | Content text, not long reading |
| #5B6FAC text on black | 4.31:1 | AA large text | Lc -28.0 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EA
oklch(88.5% 0.025 267.9)
-
Step 300
300
#B5C0DE
oklch(80.9% 0.044 269.5)
-
Step 400
400
#8F9FCE
oklch(70.7% 0.071 269.9)
-
Step 500
500
#7387C1
oklch(63.1% 0.091 269.1)
-
Step 600
600 (this color)
#5B6FAC
oklch(55.3% 0.098 269.2)
-
Step 700
700
#4C5E95
oklch(49.2% 0.091 269.1)
-
Step 800
800
#3E4D79
oklch(42.8% 0.076 268.8)
-
Step 900
900
#354061
oklch(37.7% 0.059 269.4)
-
Step 950
950
#1F2639
oklch(27.1% 0.037 268.4)
#5B6FAC 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) | #5875AE | 0.016 |
| Deuteranopia (no green cones) | #506EAB | 0.015 |
| Tritanopia (no blue cones) | #3C7C85 | 0.089 |
| Achromatopsia (no color) | #717171 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6FAC
#5B6FAC
oklch(55.3% 0.098 269.2)
- #896F22
#896F22
oklch(55.3% 0.098 89.6)
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 #5B6FAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.036
- Dull Blue #49759C ΔE 0.040
- Muted Blue #3B719F ΔE 0.043
- Windows Blue #3778BF ΔE 0.046
- Stormy Blue #507B9C ΔE 0.049
- Cerulean #457B9D ΔE 0.052
- Steel Blue #4682B4 ΔE 0.054
Use #5B6FAC 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.