#5B9BCB
Closest named color: Faded Blue (#658CBB). oklch(66.6% 0.097 242.6), rgb(91, 155, 203).
Aa
Black text reads best on this color (6.99:1).
About this color
#5B9BCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.097 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.042 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #5B9BCB |
| RGB | rgb(91, 155, 203) |
| HSL | hsl(206, 52%, 58%) |
| OKLCH | oklch(66.6% 0.097 242.6) |
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 #5B9BCB | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #5B9BCB | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #5B9BCB text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #5B9BCB text on black | 6.99:1 | AA | Lc -45.2 | Large or bold text, headings |
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
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCEA
oklch(88.6% 0.027 242.8)
-
Step 300
300
#A7C5DD
oklch(80.9% 0.047 242.4)
-
Step 400
400
#76A7CD
oklch(70.8% 0.077 242.4)
-
Step 500
500 (this color)
#5B9BCB
oklch(66.6% 0.097 242.6)
-
Step 600
600
#317AAC
oklch(55.7% 0.106 242.2)
-
Step 700
700
#236694
oklch(49.1% 0.099 242.9)
-
Step 800
800
#1F5378
oklch(42.6% 0.082 243.2)
-
Step 900
900
#204560
oklch(37.6% 0.063 242.6)
-
Step 950
950
#132938
oklch(27% 0.04 240.2)
#5B9BCB 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) | #869BCD | 0.049 |
| Deuteranopia (no green cones) | #7790CA | 0.040 |
| Tritanopia (no blue cones) | #00A7AB | 0.081 |
| Achromatopsia (no color) | #959595 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B9BCB
#5B9BCB
oklch(66.6% 0.097 242.6)
- #BF8652
#BF8652
oklch(66.6% 0.098 62.2)
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 #5B9BCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.042
- Greyblue #77A1B5 ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.062
- Blue Grey #758DA3 ΔE 0.064
- Dusty Blue #5A86AD ΔE 0.066
Use #5B9BCB 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.