#5B81AA
Closest named color: Off Blue (#5684AE). oklch(59.2% 0.076 251), rgb(91, 129, 170).
Aa
Black text reads best on this color (5.16:1).
About this color
#5B81AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.076 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.010 away. Black text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #5B81AA |
| RGB | rgb(91, 129, 170) |
| HSL | hsl(211, 32%, 51%) |
| OKLCH | oklch(59.2% 0.076 251) |
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 #5B81AA | 4.06:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #5B81AA | 5.16:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #5B81AA text on white | 4.06:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #5B81AA text on black | 5.16:1 | AA | Lc -33.9 | 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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B1C3D7
oklch(81% 0.035 251)
-
Step 400
400
#88A4C2
oklch(70.8% 0.054 250.4)
-
Step 500
500
#6A8DB3
oklch(63.2% 0.07 251)
-
Step 600
600 (this color)
#5B81AA
oklch(59.2% 0.076 251)
-
Step 700
700
#416388
oklch(49% 0.072 251.4)
-
Step 800
800
#36516E
oklch(42.6% 0.059 251)
-
Step 900
900
#2F4359
oklch(37.6% 0.046 251.4)
-
Step 950
950
#1C2834
oklch(27.1% 0.028 248.9)
#5B81AA 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) | #7182AC | 0.028 |
| Deuteranopia (no green cones) | #677AA9 | 0.023 |
| Tritanopia (no blue cones) | #3A8A8F | 0.065 |
| Achromatopsia (no color) | #7E7E7E | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B81AA
#5B81AA
oklch(59.2% 0.076 251)
- #9B7649
#9B7649
oklch(59.2% 0.077 70.9)
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 #5B81AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.010
- Dusty Blue #5A86AD ΔE 0.014
- Steel Blue #4682B4 ΔE 0.025
- Cool Blue #4984B8 ΔE 0.026
- Stormy Blue #507B9C ΔE 0.029
- Cerulean #457B9D ΔE 0.036
- Faded Blue #658CBB ΔE 0.039
- Grey Blue #647D8E ΔE 0.042
Use #5B81AA 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.