#5186CB
Closest named color: Cool Blue (#4984B8). oklch(61.4% 0.12 255.6), rgb(81, 134, 203).
Aa
Black text reads best on this color (5.62:1).
About this color
#5186CB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.120 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.031 away. Black text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #5186CB |
| RGB | rgb(81, 134, 203) |
| HSL | hsl(214, 54%, 56%) |
| OKLCH | oklch(61.4% 0.12 255.6) |
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 #5186CB | 3.73:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #5186CB | 5.62:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #5186CB text on white | 3.73:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #5186CB text on black | 5.62:1 | AA | Lc -36.9 | 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 500.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A8C3E7
oklch(80.9% 0.059 255.7)
-
Step 400
400
#79A3DB
oklch(70.7% 0.094 255.8)
-
Step 500
500 (this color)
#5186CB
oklch(61.4% 0.12 255.6)
-
Step 600
600
#3A74BE
oklch(55.6% 0.131 255.6)
-
Step 700
700
#2C61A4
oklch(49.1% 0.122 255.6)
-
Step 800
800
#264F85
oklch(42.7% 0.101 256.2)
-
Step 900
900
#23426A
oklch(37.6% 0.078 255.6)
-
Step 950
950
#15273E
oklch(27% 0.049 255.2)
#5186CB 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) | #698ACE | 0.030 |
| Deuteranopia (no green cones) | #597FCA | 0.019 |
| Tritanopia (no blue cones) | #00969F | 0.101 |
| Achromatopsia (no color) | #848484 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5186CB
#5186CB
oklch(61.4% 0.12 255.6)
- #AD791D
#AD791D
oklch(61.4% 0.119 76)
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 #5186CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.031
- Steel Blue #4682B4 ΔE 0.038
- Water Blue #0E87CC ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.040
- Faded Blue #658CBB ΔE 0.040
- Off Blue #5684AE ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.047
- Windows Blue #3778BF ΔE 0.050
Use #5186CB 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.