#18434D
Closest named color: Charcoal (#264653). oklch(35.8% 0.05 215.6), rgb(24, 67, 77).
Aa
White text reads best on this color (10.77:1).
About this color
#18434D is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.050 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.021 away. White text reads best on it, at 10.77:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.94:1 |
| White text | 10.77:1 |
Values
| HEX | #18434D |
| RGB | rgb(24, 67, 77) |
| HSL | hsl(191, 52%, 20%) |
| OKLCH | oklch(35.8% 0.05 215.6) |
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 #18434D | 10.77:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #18434D | 1.94:1 | Fails | Lc 9.1 | Not readable |
| #18434D text on white | 10.77:1 | AAA | Lc 94.8 | Preferred for body text |
| #18434D text on black | 1.94:1 | Fails | Lc -7.8 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE2
oklch(88.6% 0.021 216.2)
-
Step 300
300
#A6C7D0
oklch(80.8% 0.038 216.1)
-
Step 400
400
#75AAB8
oklch(70.6% 0.059 216.1)
-
Step 500
500
#4D95A7
oklch(63% 0.077 216.1)
-
Step 600
600
#2C7F92
oklch(55.5% 0.083 216)
-
Step 700
700
#1D6B7C
oklch(49% 0.077 215.8)
-
Step 800
800
#1B5865
oklch(42.8% 0.064 214.8)
-
Step 900
900 (this color)
#18434D
oklch(35.8% 0.05 215.6)
-
Step 950
950
#132A30
oklch(26.9% 0.031 216.7)
#18434D 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) | #3C414E | 0.044 |
| Deuteranopia (no green cones) | #343B4D | 0.040 |
| Tritanopia (no blue cones) | #004746 | 0.025 |
| Achromatopsia (no color) | #3E3E3E | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18434D
#18434D
oklch(35.8% 0.05 215.6)
- #53332A
#53332A
oklch(35.7% 0.049 36.4)
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 #18434D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.027
- Midnight Green #073B4C ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.032
- Dark Teal #014D4E ΔE 0.034
- Onyx #343A40 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.049
Use #18434D 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.