#003644
Closest named color: Midnight Green (#073B4C). oklch(30.8% 0.057 221.3), rgb(0, 54, 68).
Aa
White text reads best on this color (13.03:1).
About this color
#003644 is a dark, muted teal or cyan. In OKLCH its lightness is 31%, its chroma 0.057 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.021 away. White text reads best on it, at 13.03:1.
| Hue family | Teals and cyans |
| Lightness | dark (31%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.61:1 |
| White text | 13.03:1 |
Values
| HEX | #003644 |
| RGB | rgb(0, 54, 68) |
| HSL | hsl(192, 100%, 13%) |
| OKLCH | oklch(30.8% 0.057 221.3) |
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 #003644 | 13.03:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #003644 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #003644 text on white | 13.03:1 | AAA | Lc 98.9 | Preferred for body text |
| #003644 text on black | 1.61:1 | 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
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DDEDF3
oklch(93.6% 0.019 222.2)
-
Step 200
200
#BFDFEB
oklch(88.4% 0.038 222.5)
-
Step 300
300
#90CBDF
oklch(80.9% 0.067 221)
-
Step 400
400
#43B0D0
oklch(70.8% 0.108 221)
-
Step 500
500
#0098BB
oklch(63% 0.116 221.8)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
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
#00495B
oklch(37.6% 0.069 221.4)
-
Step 950
950 (this color)
#003644
oklch(30.8% 0.057 221.3)
#003644 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) | #2E3445 | 0.047 |
| Deuteranopia (no green cones) | #252E44 | 0.041 |
| Tritanopia (no blue cones) | #003A3B | 0.025 |
| Achromatopsia (no color) | #313131 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003644
#003644
oklch(30.8% 0.057 221.3)
- #482518
#482518
oklch(30.8% 0.058 40.9)
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 #003644, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.036
- Gunmetal #293241 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.054
- Onyx #343A40 ΔE 0.058
- Marine #042E60 ΔE 0.062
Use #003644 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.