#003B40
Closest named color: Midnight Green (#073B4C). oklch(32.1% 0.055 204.2), rgb(0, 59, 64).
Aa
White text reads best on this color (12.35:1).
About this color
#003B40 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.055 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.023 away. White text reads best on it, at 12.35:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.69:1 |
| White text | 12.35:1 |
Values
| HEX | #003B40 |
| RGB | rgb(0, 59, 64) |
| HSL | hsl(185, 100%, 13%) |
| OKLCH | oklch(32.1% 0.055 204.2) |
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 #003B40 | 12.35:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #003B40 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #003B40 text on white | 12.35:1 | AAA | Lc 97.7 | Preferred for body text |
| #003B40 text on black | 1.69:1 | 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
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DCEEF0
oklch(93.6% 0.019 204.8)
-
Step 200
200
#BFE1E4
oklch(88.6% 0.036 203.1)
-
Step 300
300
#8ECDD4
oklch(80.8% 0.065 204.7)
-
Step 400
400
#3DB3BE
oklch(70.7% 0.103 204)
-
Step 500
500
#009CA7
oklch(63.1% 0.108 203.6)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950 (this color)
#003B40
oklch(32.1% 0.055 204.2)
#003B40 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) | #353840 | 0.054 |
| Deuteranopia (no green cones) | #2D3240 | 0.050 |
| Tritanopia (no blue cones) | #003E3C | 0.015 |
| Achromatopsia (no color) | #353535 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003B40
#003B40
oklch(32.1% 0.055 204.2)
- #4B2725
#4B2725
oklch(32% 0.055 23.9)
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 #003B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.035
- Gunmetal #293241 ΔE 0.046
- Onyx #343A40 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.056
- Charcoal #264653 ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.061
- Dark Teal #014D4E ΔE 0.061
Use #003B40 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.