#186CA8
Closest named color: Mid Blue (#276AB3). oklch(51.4% 0.121 245.8), rgb(24, 108, 168).
Aa
White text reads best on this color (5.60:1).
About this color
#186CA8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.121 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.021 away. White text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #186CA8 |
| RGB | rgb(24, 108, 168) |
| HSL | hsl(205, 75%, 38%) |
| OKLCH | oklch(51.4% 0.121 245.8) |
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 #186CA8 | 5.60:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #186CA8 | 3.74:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #186CA8 text on white | 5.60:1 | AA | Lc 77.5 | Fine for body text |
| #186CA8 text on black | 3.74:1 | AA large text | Lc -24.2 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A2C5E5
oklch(80.9% 0.059 246.2)
-
Step 400
400
#6EA7D8
oklch(70.8% 0.094 245.6)
-
Step 500
500
#438FCD
oklch(63% 0.12 246)
-
Step 600
600
#1D78BA
oklch(55.5% 0.131 246)
-
Step 700
700 (this color)
#186CA8
oklch(51.4% 0.121 245.8)
-
Step 800
800
#115382
oklch(42.8% 0.1 245.6)
-
Step 900
900
#174568
oklch(37.7% 0.078 245.2)
-
Step 950
950
#0F283D
oklch(26.8% 0.05 246.5)
#186CA8 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) | #4F6FAB | 0.048 |
| Deuteranopia (no green cones) | #3B62A7 | 0.034 |
| Tritanopia (no blue cones) | #007B82 | 0.086 |
| Achromatopsia (no color) | #686868 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #186CA8
#186CA8
oklch(51.4% 0.121 245.8)
- #935700
#935700
oklch(51.4% 0.115 65.4)
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 #186CA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.021
- Ocean Blue #03719C ΔE 0.027
- French Blue #436BAD ΔE 0.034
- Muted Blue #3B719F ΔE 0.034
- Peacock Blue #016795 ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.035
- Nice Blue #107AB0 ΔE 0.040
- Sea Blue #047495 ΔE 0.043
Use #186CA8 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.