#18536C
Closest named color: Deep Teal (#00555A). oklch(41.7% 0.072 230.6), rgb(24, 83, 108).
Aa
White text reads best on this color (8.42:1).
About this color
#18536C is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.072 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.036 away. White text reads best on it, at 8.42:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.49:1 |
| White text | 8.42:1 |
Values
| HEX | #18536C |
| RGB | rgb(24, 83, 108) |
| HSL | hsl(198, 64%, 26%) |
| OKLCH | oklch(41.7% 0.072 230.6) |
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 #18536C | 8.42:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #18536C | 2.49:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #18536C text on white | 8.42:1 | AAA | Lc 88.7 | Fine for body text |
| #18536C text on black | 2.49:1 | Fails | Lc -13.5 | Not readable |
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 800.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A6C6D7
oklch(80.9% 0.042 231.1)
-
Step 400
400
#74A9C3
oklch(70.7% 0.068 230.1)
-
Step 500
500
#4D93B4
oklch(63.1% 0.086 230.7)
-
Step 600
600
#2C7DA0
oklch(55.7% 0.094 230.6)
-
Step 700
700
#1D6989
oklch(49.1% 0.087 231)
-
Step 800
800 (this color)
#18536C
oklch(41.7% 0.072 230.6)
-
Step 900
900
#1E475A
oklch(37.7% 0.056 230.9)
-
Step 950
950
#132A35
oklch(27.2% 0.035 230.7)
#18536C 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) | #46526D | 0.049 |
| Deuteranopia (no green cones) | #3B4A6C | 0.042 |
| Tritanopia (no blue cones) | #005A5B | 0.043 |
| Achromatopsia (no color) | #4D4D4D | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18536C
#18536C
oklch(41.7% 0.072 230.6)
- #6B4026
#6B4026
oklch(41.7% 0.072 50.9)
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 #18536C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.037
- Petrol #005F6A ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.044
- Light Navy #155084 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.048
- Charcoal #264653 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.052
Use #18536C 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.