#18333C
Closest named color: Gunmetal (#293241). oklch(30.4% 0.037 221.9), rgb(24, 51, 60).
Aa
White text reads best on this color (13.31:1).
About this color
#18333C is a dark, muted teal or cyan. In OKLCH its lightness is 30%, its chroma 0.037 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.026 away. White text reads best on it, at 13.31:1.
| Hue family | Teals and cyans |
| Lightness | dark (30%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.57:1 |
| White text | 13.31:1 |
Values
| HEX | #18333C |
| RGB | rgb(24, 51, 60) |
| HSL | hsl(195, 43%, 16%) |
| OKLCH | oklch(30.4% 0.037 221.9) |
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 #18333C | 13.31:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #18333C | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #18333C text on white | 13.31:1 | AAA | Lc 99.6 | Preferred for body text |
| #18333C text on black | 1.57:1 | 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 950.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A3C8D5
oklch(81% 0.043 221.2)
-
Step 400
400
#6EABC0
oklch(70.7% 0.07 221.8)
-
Step 500
500
#4395B0
oklch(63% 0.089 222.6)
-
Step 600
600
#197F9C
oklch(55.5% 0.097 222.7)
-
Step 700
700
#046B85
oklch(49% 0.09 222.5)
-
Step 800
800
#0D586C
oklch(42.8% 0.074 221.5)
-
Step 900
900
#174858
oklch(37.7% 0.058 223.4)
-
Step 950
950 (this color)
#18333C
oklch(30.4% 0.037 221.9)
#18333C 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) | #2E323C | 0.030 |
| Deuteranopia (no green cones) | #282E3C | 0.026 |
| Tritanopia (no blue cones) | #033636 | 0.024 |
| Achromatopsia (no color) | #2F2F2F | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18333C
#18333C
oklch(30.4% 0.037 221.9)
- #3F2920
#3F2920
oklch(30.5% 0.037 43.1)
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 #18333C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.026
- Midnight Green #073B4C ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.038
- Oxford Blue #1B263B ΔE 0.045
- Onyx #343A40 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.050
- Jet #212529 ΔE 0.051
Use #18333C 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.