#18423A
Closest named color: Evergreen (#05472A). oklch(34.7% 0.049 178.8), rgb(24, 66, 58).
Aa
White text reads best on this color (11.17:1).
About this color
#18423A is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.049 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Evergreen (#05472A), ΔE 0.039 away. White text reads best on it, at 11.17:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Evergreen (#05472A) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #18423A |
| RGB | rgb(24, 66, 58) |
| HSL | hsl(169, 47%, 18%) |
| OKLCH | oklch(34.7% 0.049 178.8) |
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 #18423A | 11.17:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #18423A | 1.87:1 | Fails | Lc 8.2 | Not readable |
| #18423A text on white | 11.17:1 | AAA | Lc 95.6 | Preferred for body text |
| #18423A text on black | 1.87:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDED9
oklch(88.6% 0.02 177.4)
-
Step 300
300
#A8C9C1
oklch(80.9% 0.037 179)
-
Step 400
400
#78ADA1
oklch(70.7% 0.059 178.8)
-
Step 500
500
#52998A
oklch(63.2% 0.076 178.4)
-
Step 600
600
#338374
oklch(55.6% 0.081 178.7)
-
Step 700
700
#246F61
oklch(49.2% 0.076 178.2)
-
Step 800
800
#205A4F
oklch(42.6% 0.063 178.5)
-
Step 900
900 (this color)
#18423A
oklch(34.7% 0.049 178.8)
-
Step 950
950
#142B27
oklch(26.9% 0.03 181.4)
#18423A 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) | #3F3E3A | 0.051 |
| Deuteranopia (no green cones) | #39393B | 0.050 |
| Tritanopia (no blue cones) | #004340 | 0.015 |
| Achromatopsia (no color) | #3B3B3B | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18423A
#18423A
oklch(34.7% 0.049 178.8)
- #4F2F39
#4F2F39
oklch(34.8% 0.049 359.7)
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 #18423A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Evergreen #05472A ΔE 0.039
- Dark Teal #014D4E ΔE 0.041
- Onyx #343A40 ΔE 0.046
- Charcoal #264653 ΔE 0.047
- Midnight Green #073B4C ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.050
- Dark Blue Green #005249 ΔE 0.052
Use #18423A 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.