#5B8FBC
Closest named color: Faded Blue (#658CBB). oklch(63.2% 0.088 245.9), rgb(91, 143, 188).
Aa
Black text reads best on this color (6.09:1).
About this color
#5B8FBC is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.088 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.013 away. Black text reads best on it, at 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #5B8FBC |
| RGB | rgb(91, 143, 188) |
| HSL | hsl(208, 42%, 55%) |
| OKLCH | oklch(63.2% 0.088 245.9) |
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 #5B8FBC | 3.44:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #5B8FBC | 6.09:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #5B8FBC text on white | 3.44:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #5B8FBC text on black | 6.09:1 | AA | Lc -39.9 | 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
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ABC4DB
oklch(80.9% 0.042 246.1)
-
Step 400
400
#7DA5C9
oklch(70.6% 0.069 246.1)
-
Step 500
500 (this color)
#5B8FBC
oklch(63.2% 0.088 245.9)
-
Step 600
600
#3F78A8
oklch(55.5% 0.096 246.1)
-
Step 700
700
#316590
oklch(49.1% 0.089 245.9)
-
Step 800
800
#295375
oklch(42.8% 0.074 245.2)
-
Step 900
900
#26445E
oklch(37.6% 0.058 246.2)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#5B8FBC 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) | #7C90BE | 0.040 |
| Deuteranopia (no green cones) | #6F86BB | 0.031 |
| Tritanopia (no blue cones) | #279A9E | 0.075 |
| Achromatopsia (no color) | #8A8A8A | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8FBC
#5B8FBC
oklch(63.2% 0.088 245.9)
- #AE7F4E
#AE7F4E
oklch(63.2% 0.088 66.3)
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 #5B8FBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.013
- Dusty Blue #5A86AD ΔE 0.030
- Off Blue #5684AE ΔE 0.035
- Cool Blue #4984B8 ΔE 0.038
- Silver Lake Blue #778DA9 ΔE 0.040
- Blue Grey #758DA3 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.045
- Blue NCS #118AB2 ΔE 0.056
Use #5B8FBC 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.