#186DB9
Closest named color: Mid Blue (#276AB3). oklch(52.7% 0.142 251), rgb(24, 109, 185).
Aa
White text reads best on this color (5.34:1).
About this color
#186DB9 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.142 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.012 away. White text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.92:1 |
| White text | 5.34:1 |
Values
| HEX | #186DB9 |
| RGB | rgb(24, 109, 185) |
| HSL | hsl(208, 77%, 41%) |
| OKLCH | oklch(52.7% 0.142 251) |
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 #186DB9 | 5.34:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #186DB9 | 3.92:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #186DB9 text on white | 5.34:1 | AA | Lc 76.1 | Fine for body text |
| #186DB9 text on black | 3.92:1 | AA large text | Lc -25.6 | 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 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A3C4E9
oklch(80.9% 0.064 251.5)
-
Step 400
400
#6FA5DE
oklch(70.7% 0.102 250.7)
-
Step 500
500
#468DD5
oklch(63.1% 0.13 250.9)
-
Step 600
600 (this color)
#186DB9
oklch(52.7% 0.142 251)
-
Step 700
700
#1562A8
oklch(49% 0.132 251.3)
-
Step 800
800
#165188
oklch(42.8% 0.109 250.9)
-
Step 900
900
#1A436D
oklch(37.6% 0.085 251.6)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#186DB9 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) | #4772BC | 0.040 |
| Deuteranopia (no green cones) | #2B64B8 | 0.025 |
| Tritanopia (no blue cones) | #007F8A | 0.103 |
| Achromatopsia (no color) | #6B6B6B | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #186DB9
#186DB9
oklch(52.7% 0.142 251)
- #935E00
#935E00
oklch(52.7% 0.113 71.4)
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 #186DB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.012
- French Blue #436BAD ΔE 0.034
- Windows Blue #3778BF ΔE 0.040
- Nice Blue #107AB0 ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.043
- Muted Blue #3B719F ΔE 0.050
- Ocean Blue #03719C ΔE 0.051
- Peacock Blue #016795 ΔE 0.059
Use #186DB9 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.