#5F81BB
Closest named color: Cool Blue (#4984B8). oklch(60.2% 0.097 260.7), rgb(95, 129, 187).
Aa
Black text reads best on this color (5.34:1).
About this color
#5F81BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.097 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.025 away. Black text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.34:1 |
| White text | 3.92:1 |
Values
| HEX | #5F81BB |
| RGB | rgb(95, 129, 187) |
| HSL | hsl(218, 40%, 55%) |
| OKLCH | oklch(60.2% 0.097 260.7) |
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 #5F81BB | 3.92:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #5F81BB | 5.34:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #5F81BB text on white | 3.92:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #5F81BB text on black | 5.34:1 | AA | Lc -35.1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AFC2E0
oklch(80.9% 0.047 259.5)
-
Step 400
400
#86A2D1
oklch(70.9% 0.076 260.6)
-
Step 500
500 (this color)
#5F81BB
oklch(60.2% 0.097 260.7)
-
Step 600
600
#4F73B1
oklch(55.7% 0.105 260.7)
-
Step 700
700
#3F6098
oklch(49.1% 0.098 260.4)
-
Step 800
800
#354F7B
oklch(42.8% 0.08 260.4)
-
Step 900
900
#2E4263
oklch(37.8% 0.062 260.1)
-
Step 950
950
#1B273A
oklch(27.1% 0.039 259.4)
#5F81BB 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) | #6B85BD | 0.020 |
| Deuteranopia (no green cones) | #607CBA | 0.014 |
| Tritanopia (no blue cones) | #378E96 | 0.087 |
| Achromatopsia (no color) | #808080 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F81BB
#5F81BB
oklch(60.2% 0.097 260.7)
- #9F7A36
#9F7A36
oklch(60.2% 0.097 80.2)
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 #5F81BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.025
- Off Blue #5684AE ΔE 0.026
- Steel Blue #4682B4 ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.030
- Faded Blue #658CBB ΔE 0.033
- Windows Blue #3778BF ΔE 0.051
- Stormy Blue #507B9C ΔE 0.053
- Water Blue #0E87CC ΔE 0.057
Use #5F81BB 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.