#186D90
Closest named color: Ocean Blue (#03719C). oklch(50.3% 0.094 231.4), rgb(24, 109, 144).
Aa
White text reads best on this color (5.78:1).
About this color
#186D90 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.094 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.020 away. White text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.62:1 |
| White text | 5.78:1 |
Values
| HEX | #186D90 |
| RGB | rgb(24, 109, 144) |
| HSL | hsl(198, 71%, 33%) |
| OKLCH | oklch(50.3% 0.094 231.4) |
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 #186D90 | 5.78:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #186D90 | 3.62:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #186D90 text on white | 5.78:1 | AA | Lc 78.6 | Fine for body text |
| #186D90 text on black | 3.62:1 | AA large text | Lc -23.2 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C7D9
oklch(81% 0.045 230.4)
-
Step 400
400
#71A9C6
oklch(70.7% 0.072 231.7)
-
Step 500
500
#4793B8
oklch(63% 0.093 232)
-
Step 600
600
#227DA4
oklch(55.6% 0.101 231.7)
-
Step 700
700 (this color)
#186D90
oklch(50.3% 0.094 231.4)
-
Step 800
800
#145672
oklch(42.7% 0.078 231.6)
-
Step 900
900
#1A475C
oklch(37.7% 0.06 231.8)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#186D90 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) | #5B6C92 | 0.062 |
| Deuteranopia (no green cones) | #4C618F | 0.052 |
| Tritanopia (no blue cones) | #007679 | 0.054 |
| Achromatopsia (no color) | #656565 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #186D90
#186D90
oklch(50.3% 0.094 231.4)
- #8E532E
#8E532E
oklch(50.3% 0.094 51.2)
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 #186D90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.020
- Sea Blue #047495 ΔE 0.020
- Peacock Blue #016795 ΔE 0.024
- Denim #3B638C ΔE 0.035
- Muted Blue #3B719F ΔE 0.038
- Ocean #017B92 ΔE 0.042
- Deep Aqua #08787F ΔE 0.050
- Flat Blue #3C73A8 ΔE 0.050
Use #186D90 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.