#5B83BC
Closest named color: Cool Blue (#4984B8). oklch(60.5% 0.098 257.3), rgb(91, 131, 188).
Aa
Black text reads best on this color (5.41:1).
About this color
#5B83BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.098 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.020 away. Black text reads best on it, at 5.41:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.41:1 |
| White text | 3.87:1 |
Values
| HEX | #5B83BC |
| RGB | rgb(91, 131, 188) |
| HSL | hsl(215, 42%, 55%) |
| OKLCH | oklch(60.5% 0.098 257.3) |
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 #5B83BC | 3.87:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #5B83BC | 5.41:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #5B83BC text on white | 3.87:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #5B83BC text on black | 5.41:1 | AA | Lc -35.6 | 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
#ADC2E0
oklch(80.8% 0.048 257.3)
-
Step 400
400
#82A3D1
oklch(70.8% 0.077 256.8)
-
Step 500
500 (this color)
#5B83BC
oklch(60.5% 0.098 257.3)
-
Step 600
600
#4974B1
oklch(55.6% 0.107 257.2)
-
Step 700
700
#3A6198
oklch(49% 0.099 257.2)
-
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
#19273A
oklch(27% 0.041 256.3)
#5B83BC 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) | #6D86BE | 0.024 |
| Deuteranopia (no green cones) | #617DBB | 0.017 |
| Tritanopia (no blue cones) | #2B9097 | 0.088 |
| Achromatopsia (no color) | #818181 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B83BC
#5B83BC
oklch(60.5% 0.098 257.3)
- #A27936
#A27936
oklch(60.3% 0.098 77.2)
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 #5B83BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.020
- Off Blue #5684AE ΔE 0.024
- Steel Blue #4682B4 ΔE 0.026
- Dusty Blue #5A86AD ΔE 0.027
- Faded Blue #658CBB ΔE 0.030
- Windows Blue #3778BF ΔE 0.051
- Water Blue #0E87CC ΔE 0.052
- Stormy Blue #507B9C ΔE 0.053
Use #5B83BC 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.