#5186CF
Closest named color: Dark Sky Blue (#448EE4). oklch(61.6% 0.125 256.7), rgb(81, 134, 207).
Aa
Black text reads best on this color (5.66:1).
About this color
#5186CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.125 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.035 away. Black text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #5186CF |
| RGB | rgb(81, 134, 207) |
| HSL | hsl(215, 57%, 56%) |
| OKLCH | oklch(61.6% 0.125 256.7) |
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 #5186CF | 3.70:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #5186CF | 5.66:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #5186CF text on white | 3.70:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #5186CF text on black | 5.66:1 | AA | Lc -37.2 | 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
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF0
oklch(88.6% 0.034 255.2)
-
Step 300
300
#A8C3E8
oklch(81% 0.06 256.3)
-
Step 400
400
#79A3DD
oklch(70.8% 0.097 256.6)
-
Step 500
500 (this color)
#5186CF
oklch(61.6% 0.125 256.7)
-
Step 600
600
#3973C1
oklch(55.6% 0.136 256.6)
-
Step 700
700
#2C60A7
oklch(49.1% 0.127 257)
-
Step 800
800
#254F87
oklch(42.7% 0.104 256.5)
-
Step 900
900
#23426C
oklch(37.7% 0.081 256.5)
-
Step 950
950
#15273F
oklch(27% 0.051 256.1)
#5186CF 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) | #678BD2 | 0.029 |
| Deuteranopia (no green cones) | #567FCD | 0.019 |
| Tritanopia (no blue cones) | #0097A1 | 0.105 |
| Achromatopsia (no color) | #858585 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5186CF
#5186CF
oklch(61.6% 0.125 256.7)
- #AF7910
#AF7910
oklch(61.6% 0.125 76.4)
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 #5186CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.035
- Cool Blue #4984B8 ΔE 0.037
- Water Blue #0E87CC ΔE 0.040
- Steel Blue #4682B4 ΔE 0.044
- Faded Blue #658CBB ΔE 0.044
- Soft Blue #6488EA ΔE 0.047
- Off Blue #5684AE ΔE 0.050
- Windows Blue #3778BF ΔE 0.052
Use #5186CF 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.