#18554A
Closest named color: Dark Blue Green (#005249). oklch(40.8% 0.064 178.5), rgb(24, 85, 74).
Aa
White text reads best on this color (8.61:1).
About this color
#18554A is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.064 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.016 away. White text reads best on it, at 8.61:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.43:1 |
| White text | 8.61:1 |
Values
| HEX | #18554A |
| RGB | rgb(24, 85, 74) |
| HSL | hsl(169, 56%, 21%) |
| OKLCH | oklch(40.8% 0.064 178.5) |
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 #18554A | 8.61:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #18554A | 2.43:1 | Fails | Lc 14.7 | Not readable |
| #18554A text on white | 8.61:1 | AAA | Lc 89.3 | Fine for body text |
| #18554A text on black | 2.43:1 | Fails | Lc -12.9 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A8C9C1
oklch(80.9% 0.037 179)
-
Step 400
400
#77ADA1
oklch(70.6% 0.06 179.1)
-
Step 500
500
#51998A
oklch(63.2% 0.076 178.5)
-
Step 600
600
#308374
oklch(55.5% 0.083 179)
-
Step 700
700
#226F61
oklch(49.1% 0.077 178.4)
-
Step 800
800 (this color)
#18554A
oklch(40.8% 0.064 178.5)
-
Step 900
900
#204A42
oklch(37.6% 0.049 179.4)
-
Step 950
950
#142C27
oklch(27.2% 0.032 178.7)
#18554A 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) | #51504A | 0.067 |
| Deuteranopia (no green cones) | #49494B | 0.065 |
| Tritanopia (no blue cones) | #005652 | 0.014 |
| Achromatopsia (no color) | #4C4C4C | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18554A
#18554A
oklch(40.8% 0.064 178.5)
- #663A49
#663A49
oklch(40.7% 0.065 358.5)
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 #18554A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.016
- Deep Teal #00555A ΔE 0.027
- Dark Slate Gray #2F4F4F ΔE 0.031
- Dark Teal #014D4E ΔE 0.033
- Dark Green Blue #1F6357 ΔE 0.047
- Spruce #0A5F38 ΔE 0.051
- Pine #2B5D34 ΔE 0.051
- Petrol #005F6A ΔE 0.053
Use #18554A 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.