#5B7CBE
Closest named color: Cool Blue (#4984B8). oklch(59.1% 0.109 263.3), rgb(91, 124, 190).
Aa
Black text reads best on this color (5.07:1).
About this color
#5B7CBE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.109 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.031 away. Black text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.07:1 |
| White text | 4.14:1 |
Values
| HEX | #5B7CBE |
| RGB | rgb(91, 124, 190) |
| HSL | hsl(220, 43%, 55%) |
| OKLCH | oklch(59.1% 0.109 263.3) |
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 #5B7CBE | 4.14:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #5B7CBE | 5.07:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #5B7CBE text on white | 4.14:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #5B7CBE text on black | 5.07:1 | AA | Lc -33.3 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9EC
oklch(88.4% 0.028 265.4)
-
Step 300
300
#B0C1E1
oklch(80.9% 0.049 263.1)
-
Step 400
400
#87A1D2
oklch(70.7% 0.078 262.8)
-
Step 500
500
#6A89C6
oklch(63.2% 0.099 263.2)
-
Step 600
600 (this color)
#5B7CBE
oklch(59.1% 0.109 263.3)
-
Step 700
700
#425F9A
oklch(49.1% 0.101 263.3)
-
Step 800
800
#364E7D
oklch(42.7% 0.084 262.8)
-
Step 900
900
#2F4164
oklch(37.7% 0.065 262.9)
-
Step 950
950
#1C263B
oklch(27% 0.042 264.3)
#5B7CBE 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) | #6282C1 | 0.020 |
| Deuteranopia (no green cones) | #5778BD | 0.013 |
| Tritanopia (no blue cones) | #2B8A94 | 0.097 |
| Achromatopsia (no color) | #7D7D7D | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B7CBE
#5B7CBE
oklch(59.1% 0.109 263.3)
- #9C7722
#9C7722
oklch(59.1% 0.108 83.7)
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 #5B7CBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.031
- Steel Blue #4682B4 ΔE 0.033
- Off Blue #5684AE ΔE 0.038
- Windows Blue #3778BF ΔE 0.039
- Dusty Blue #5A86AD ΔE 0.044
- Faded Blue #658CBB ΔE 0.050
- Flat Blue #3C73A8 ΔE 0.055
- Water Blue #0E87CC ΔE 0.055
Use #5B7CBE 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.