#185A99
Closest named color: Dusk Blue (#26538D). oklch(46.2% 0.121 251.6), rgb(24, 90, 153).
Aa
White text reads best on this color (7.09:1).
About this color
#185A99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.121 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.025 away. White text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.96:1 |
| White text | 7.09:1 |
Values
| HEX | #185A99 |
| RGB | rgb(24, 90, 153) |
| HSL | hsl(209, 73%, 35%) |
| OKLCH | oklch(46.2% 0.121 251.6) |
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 #185A99 | 7.09:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #185A99 | 2.96:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #185A99 text on white | 7.09:1 | AAA | Lc 84.2 | Fine for body text |
| #185A99 text on black | 2.96:1 | Fails | Lc -17.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A6C4E6
oklch(81% 0.058 251.8)
-
Step 400
400
#75A5D9
oklch(70.8% 0.092 251.1)
-
Step 500
500
#4F8DCF
oklch(63.1% 0.119 251.5)
-
Step 600
600
#3076BC
oklch(55.6% 0.129 251.3)
-
Step 700
700 (this color)
#185A99
oklch(46.2% 0.121 251.6)
-
Step 800
800
#1F5184
oklch(42.8% 0.1 251.7)
-
Step 900
900
#1F4369
oklch(37.6% 0.078 251.7)
-
Step 950
950
#13283E
oklch(27.1% 0.049 251.1)
#185A99 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) | #3B5E9C | 0.034 |
| Deuteranopia (no green cones) | #255398 | 0.020 |
| Tritanopia (no blue cones) | #006972 | 0.089 |
| Achromatopsia (no color) | #585858 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #185A99
#185A99
oklch(46.2% 0.121 251.6)
- #7A4D00
#7A4D00
oklch(46% 0.099 71.2)
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 #185A99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.031
- Peacock Blue #016795 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.042
- Light Navy #155084 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.049
- Denim #3B638C ΔE 0.049
Use #185A99 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.