#003F40
Closest named color: Midnight Green (#073B4C). oklch(33.3% 0.057 196.6), rgb(0, 63, 64).
Aa
White text reads best on this color (11.76:1).
About this color
#003F40 is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.057 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.030 away. White text reads best on it, at 11.76:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.78:1 |
| White text | 11.76:1 |
Values
| HEX | #003F40 |
| RGB | rgb(0, 63, 64) |
| HSL | hsl(181, 100%, 13%) |
| OKLCH | oklch(33.3% 0.057 196.6) |
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 #003F40 | 11.76:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #003F40 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #003F40 text on white | 11.76:1 | AAA | Lc 96.6 | Preferred for body text |
| #003F40 text on black | 1.78:1 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1EDEC
oklch(93.7% 0.013 190.9)
-
Step 200
200
#C8DEDE
oklch(88.4% 0.023 196.7)
-
Step 300
300
#A1CACA
oklch(81% 0.043 196.3)
-
Step 400
400
#6BAEAF
oklch(70.7% 0.068 196.9)
-
Step 500
500
#3C9A9B
oklch(63.2% 0.087 196.2)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800
#005B5C
oklch(42.7% 0.073 196.1)
-
Step 900
900 (this color)
#003F40
oklch(33.3% 0.057 196.6)
-
Step 950
950
#0D2C2C
oklch(27% 0.036 195.2)
#003F40 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) | #3A3B40 | 0.059 |
| Deuteranopia (no green cones) | #313540 | 0.055 |
| Tritanopia (no blue cones) | #00423F | 0.011 |
| Achromatopsia (no color) | #383838 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003F40
#003F40
oklch(33.3% 0.057 196.6)
- #4F292C
#4F292C
oklch(33.2% 0.057 15.6)
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 #003F40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.039
- Dark Teal #014D4E ΔE 0.048
- Charcoal #264653 ΔE 0.051
- Onyx #343A40 ΔE 0.051
- Evergreen #05472A ΔE 0.054
- Gunmetal #293241 ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.063
Use #003F40 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.