#5B658C
Closest named color: Dusky Blue (#475F94). oklch(51.4% 0.063 272.9), rgb(91, 101, 140).
Aa
White text reads best on this color (5.69:1).
About this color
#5B658C is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.063 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.037 away. White text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #5B658C |
| RGB | rgb(91, 101, 140) |
| HSL | hsl(228, 21%, 45%) |
| OKLCH | oklch(51.4% 0.063 272.9) |
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 #5B658C | 5.69:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #5B658C | 3.68:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #5B658C text on white | 5.69:1 | AA | Lc 78.5 | Fine for body text |
| #5B658C text on black | 3.68:1 | AA large text | Lc -23.3 | 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 700.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAF0
oklch(93.7% 0.008 271.3)
-
Step 200
200
#D5D9E5
oklch(88.6% 0.017 271.2)
-
Step 300
300
#BAC0D5
oklch(81% 0.03 273)
-
Step 400
400
#969FC0
oklch(70.7% 0.049 273.1)
-
Step 500
500
#7D87B0
oklch(63.1% 0.063 273.8)
-
Step 600
600
#66719C
oklch(55.7% 0.068 273)
-
Step 700
700 (this color)
#5B658C
oklch(51.4% 0.063 272.9)
-
Step 800
800
#454D6C
oklch(42.6% 0.053 272.9)
-
Step 900
900
#3A4058
oklch(37.6% 0.042 273.4)
-
Step 950
950
#222633
oklch(27.1% 0.025 271.4)
#5B658C 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) | #59698E | 0.011 |
| Deuteranopia (no green cones) | #55658B | 0.009 |
| Tritanopia (no blue cones) | #4D6D73 | 0.057 |
| Achromatopsia (no color) | #676767 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B658C
#5B658C
oklch(51.4% 0.063 272.9)
- #74673B
#74673B
oklch(51.5% 0.064 93.5)
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 #5B658C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.037
- Denim #3B638C ΔE 0.041
- Metallic Blue #4F738E ΔE 0.042
- Slate #516572 ΔE 0.046
- Dull Blue #49759C ΔE 0.048
- Muted Blue #3B719F ΔE 0.049
- Dusty Grape #545775 ΔE 0.051
- Dusk #4E5481 ΔE 0.055
Use #5B658C 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.