#5186B2
Closest named color: Off Blue (#5684AE). oklch(60.1% 0.088 245), rgb(81, 134, 178).
Aa
Black text reads best on this color (5.40:1).
About this color
#5186B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.088 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.008 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #5186B2 |
| RGB | rgb(81, 134, 178) |
| HSL | hsl(207, 39%, 51%) |
| OKLCH | oklch(60.1% 0.088 245) |
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 #5186B2 | 3.88:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #5186B2 | 5.40:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #5186B2 text on white | 3.88:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #5186B2 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
#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
#AAC4DB
oklch(80.8% 0.043 245.1)
-
Step 400
400
#7CA6C9
oklch(70.8% 0.069 244.1)
-
Step 500
500 (this color)
#5186B2
oklch(60.1% 0.088 245)
-
Step 600
600
#3E79A8
oklch(55.7% 0.096 244.8)
-
Step 700
700
#306590
oklch(49.1% 0.089 245.6)
-
Step 800
800
#285375
oklch(42.8% 0.074 244.7)
-
Step 900
900
#26455E
oklch(37.8% 0.057 244.4)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#5186B2 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) | #7387B4 | 0.040 |
| Deuteranopia (no green cones) | #667DB1 | 0.032 |
| Tritanopia (no blue cones) | #119195 | 0.075 |
| Achromatopsia (no color) | #818181 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5186B2
#5186B2
oklch(60.1% 0.088 245)
- #A57545
#A57545
oklch(60.1% 0.088 64.8)
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 #5186B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.008
- Dusty Blue #5A86AD ΔE 0.012
- Cool Blue #4984B8 ΔE 0.014
- Steel Blue #4682B4 ΔE 0.018
- Faded Blue #658CBB ΔE 0.032
- Blue NCS #118AB2 ΔE 0.039
- Stormy Blue #507B9C ΔE 0.041
- Cerulean #457B9D ΔE 0.044
Use #5186B2 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.