#5B83BB
Closest named color: Cool Blue (#4984B8). oklch(60.4% 0.097 256.9), rgb(91, 131, 187).
Aa
Black text reads best on this color (5.40:1).
About this color
#5B83BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.097 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.019 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #5B83BB |
| RGB | rgb(91, 131, 187) |
| HSL | hsl(215, 41%, 55%) |
| OKLCH | oklch(60.4% 0.097 256.9) |
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 #5B83BB | 3.88:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #5B83BB | 5.40:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #5B83BB text on white | 3.88:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #5B83BB text on black | 5.40:1 | AA | Lc -35.5 | 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
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#AEC2E0
oklch(80.9% 0.048 258.4)
-
Step 400
400
#82A3D0
oklch(70.8% 0.076 256.3)
-
Step 500
500 (this color)
#5B83BB
oklch(60.4% 0.097 256.9)
-
Step 600
600
#4974B0
oklch(55.5% 0.106 256.9)
-
Step 700
700
#3A6197
oklch(49% 0.098 256.8)
-
Step 800
800
#31507B
oklch(42.8% 0.081 256.8)
-
Step 900
900
#2B4263
oklch(37.6% 0.064 257.4)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#5B83BB 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) | #6D86BD | 0.024 |
| Deuteranopia (no green cones) | #617DBA | 0.017 |
| Tritanopia (no blue cones) | #2C8F97 | 0.085 |
| Achromatopsia (no color) | #818181 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B83BB
#5B83BB
oklch(60.4% 0.097 256.9)
- #A27938
#A27938
oklch(60.4% 0.097 76.6)
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 #5B83BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.019
- Off Blue #5684AE ΔE 0.022
- Steel Blue #4682B4 ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.026
- Faded Blue #658CBB ΔE 0.030
- Windows Blue #3778BF ΔE 0.051
- Stormy Blue #507B9C ΔE 0.052
- Water Blue #0E87CC ΔE 0.053
Use #5B83BB 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.