#5B8CBC
Closest named color: Faded Blue (#658CBB). oklch(62.5% 0.09 249), rgb(91, 140, 188).
Aa
Black text reads best on this color (5.92:1).
About this color
#5B8CBC is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.090 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.011 away. Black text reads best on it, at 5.92:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.92:1 |
| White text | 3.54:1 |
Values
| HEX | #5B8CBC |
| RGB | rgb(91, 140, 188) |
| HSL | hsl(210, 42%, 55%) |
| OKLCH | oklch(62.5% 0.09 249) |
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 #5B8CBC | 3.54:1 | AA large text | Lc -68.4 | Content text, not long reading |
| Black text on #5B8CBC | 5.92:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #5B8CBC text on white | 3.54:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #5B8CBC text on black | 5.92:1 | AA | Lc -38.8 | 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 500.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE9
oklch(88.5% 0.025 248.1)
-
Step 300
300
#ABC4DD
oklch(81% 0.045 248.4)
-
Step 400
400
#7EA5CB
oklch(70.7% 0.07 248.2)
-
Step 500
500 (this color)
#5B8CBC
oklch(62.5% 0.09 249)
-
Step 600
600
#4277AA
oklch(55.5% 0.098 249.2)
-
Step 700
700
#336492
oklch(49.1% 0.091 248.8)
-
Step 800
800
#2B5277
oklch(42.8% 0.076 248.9)
-
Step 900
900
#274460
oklch(37.7% 0.06 248.9)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#5B8CBC 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) | #788DBE | 0.035 |
| Deuteranopia (no green cones) | #6C84BB | 0.027 |
| Tritanopia (no blue cones) | #28979C | 0.078 |
| Achromatopsia (no color) | #888888 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8CBC
#5B8CBC
oklch(62.5% 0.09 249)
- #AB7D48
#AB7D48
oklch(62.4% 0.09 68.8)
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 #5B8CBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.011
- Dusty Blue #5A86AD ΔE 0.025
- Off Blue #5684AE ΔE 0.029
- Cool Blue #4984B8 ΔE 0.031
- Steel Blue #4682B4 ΔE 0.039
- Silver Lake Blue #778DA9 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.048
- Blue NCS #118AB2 ΔE 0.054
Use #5B8CBC 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.