#17403B
Closest named color: Midnight Green (#073B4C). oklch(34.1% 0.047 184.5), rgb(23, 64, 59).
Aa
White text reads best on this color (11.45:1).
About this color
#17403B is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.047 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.041 away. White text reads best on it, at 11.45:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.83:1 |
| White text | 11.45:1 |
Values
| HEX | #17403B |
| RGB | rgb(23, 64, 59) |
| HSL | hsl(173, 47%, 17%) |
| OKLCH | oklch(34.1% 0.047 184.5) |
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 #17403B | 11.45:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #17403B | 1.83:1 | Fails | Lc 7.7 | Not readable |
| #17403B text on white | 11.45:1 | AAA | Lc 96.2 | Preferred for body text |
| #17403B text on black | 1.83:1 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDEDA
oklch(88.6% 0.02 181.1)
-
Step 300
300
#A9C8C3
oklch(80.8% 0.034 184.7)
-
Step 400
400
#79ACA5
oklch(70.6% 0.055 185.4)
-
Step 500
500
#53988F
oklch(63.2% 0.072 184.7)
-
Step 600
600
#348279
oklch(55.6% 0.077 184.9)
-
Step 700
700
#256E66
oklch(49.1% 0.072 185)
-
Step 800
800
#215A53
oklch(42.8% 0.06 184.2)
-
Step 900
900 (this color)
#17403B
oklch(34.1% 0.047 184.5)
-
Step 950
950
#142B28
oklch(26.9% 0.03 184.8)
#17403B 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) | #3D3C3B | 0.050 |
| Deuteranopia (no green cones) | #36383C | 0.046 |
| Tritanopia (no blue cones) | #00413E | 0.013 |
| Achromatopsia (no color) | #3A3A3A | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17403B
#17403B
oklch(34.1% 0.047 184.5)
- #4D2E35
#4D2E35
oklch(34.2% 0.047 5.1)
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 #17403B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.042
- Onyx #343A40 ΔE 0.043
- Evergreen #05472A ΔE 0.045
- Dark Teal #014D4E ΔE 0.045
- Charcoal #264653 ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.050
- Pakistan Green #283618 ΔE 0.055
Use #17403B 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.