#186DC4
Closest named color: Mid Blue (#276AB3). oklch(53.5% 0.156 253.7), rgb(24, 109, 196).
Aa
White text reads best on this color (5.21:1).
About this color
#186DC4 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.156 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.027 away. White text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.02:1 |
| White text | 5.21:1 |
Values
| HEX | #186DC4 |
| RGB | rgb(24, 109, 196) |
| HSL | hsl(210, 78%, 43%) |
| OKLCH | oklch(53.5% 0.156 253.7) |
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 #186DC4 | 5.21:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #186DC4 | 4.02:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #186DC4 text on white | 5.21:1 | AA | Lc 75.3 | Fine for body text |
| #186DC4 text on black | 4.02:1 | AA large text | Lc -26.4 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C4EE
oklch(81% 0.07 253.9)
-
Step 400
400
#6EA4E5
oklch(70.8% 0.112 253.8)
-
Step 500
500
#448BDD
oklch(63% 0.143 253.8)
-
Step 600
600 (this color)
#186DC4
oklch(53.5% 0.156 253.7)
-
Step 700
700
#1260B0
oklch(49% 0.146 254)
-
Step 800
800
#134F8E
oklch(42.6% 0.12 253.6)
-
Step 900
900
#184272
oklch(37.7% 0.095 254)
-
Step 950
950
#102742
oklch(27% 0.058 253.9)
#186DC4 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) | #3F74C7 | 0.036 |
| Deuteranopia (no green cones) | #1866C2 | 0.019 |
| Tritanopia (no blue cones) | #00828F | 0.116 |
| Achromatopsia (no color) | #6C6C6C | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #186DC4
#186DC4
oklch(53.5% 0.156 253.7)
- #946100
#946100
oklch(53.5% 0.114 73.4)
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 #186DC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.027
- Windows Blue #3778BF ΔE 0.041
- French Blue #436BAD ΔE 0.045
- Nice Blue #107AB0 ΔE 0.053
- Flat Blue #3C73A8 ΔE 0.055
- Royal Blue #4169E1 ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.064
- Muted Blue #3B719F ΔE 0.065
Use #186DC4 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.