#003F4F
Closest named color: Midnight Green (#073B4C). oklch(34.1% 0.063 221.5), rgb(0, 63, 79).
Aa
White text reads best on this color (11.51:1).
About this color
#003F4F is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.063 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.013 away. White text reads best on it, at 11.51:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.82:1 |
| White text | 11.51:1 |
Values
| HEX | #003F4F |
| RGB | rgb(0, 63, 79) |
| HSL | hsl(192, 100%, 15%) |
| OKLCH | oklch(34.1% 0.063 221.5) |
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 #003F4F | 11.51:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #003F4F | 1.82:1 | Fails | Lc 7.8 | Not readable |
| #003F4F text on white | 11.51:1 | AAA | Lc 96.1 | Preferred for body text |
| #003F4F text on black | 1.82:1 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C7DDE5
oklch(88.4% 0.026 221.6)
-
Step 300
300
#A0C8D6
oklch(80.9% 0.047 221.2)
-
Step 400
400
#69ACC2
oklch(70.8% 0.075 221)
-
Step 500
500
#3896B3
oklch(63% 0.097 222.1)
-
Step 600
600
#00809E
oklch(55.6% 0.103 221.9)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900 (this color)
#003F4F
oklch(34.1% 0.063 221.5)
-
Step 950
950
#0C2B34
oklch(27.1% 0.04 220.3)
#003F4F 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) | #363D50 | 0.051 |
| Deuteranopia (no green cones) | #2C364F | 0.045 |
| Tritanopia (no blue cones) | #004444 | 0.030 |
| Achromatopsia (no color) | #393939 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003F4F
#003F4F
oklch(34.1% 0.063 221.5)
- #532C1D
#532C1D
oklch(34% 0.063 41.5)
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 #003F4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.013
- Dark Blue Grey #1F3B4D ΔE 0.023
- Charcoal #264653 ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.046
- Dark Teal #014D4E ΔE 0.049
- Gunmetal #293241 ΔE 0.051
- Onyx #343A40 ΔE 0.051
Use #003F4F 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.