#19403A
Closest named color: Onyx (#343A40). oklch(34.1% 0.046 182), rgb(25, 64, 58).
Aa
White text reads best on this color (11.43:1).
About this color
#19403A is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.046 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.042 away. White text reads best on it, at 11.43:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.83:1 |
| White text | 11.43:1 |
Values
| HEX | #19403A |
| RGB | rgb(25, 64, 58) |
| HSL | hsl(171, 44%, 17%) |
| OKLCH | oklch(34.1% 0.046 182) |
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 #19403A | 11.43:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #19403A | 1.83:1 | Fails | Lc 7.7 | Not readable |
| #19403A text on white | 11.43:1 | AAA | Lc 96.2 | Preferred for body text |
| #19403A 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
#CCDDDA
oklch(88.4% 0.019 184.2)
-
Step 300
300
#A9C8C2
oklch(80.8% 0.034 182.4)
-
Step 400
400
#7AACA3
oklch(70.6% 0.055 182.3)
-
Step 500
500
#56988D
oklch(63.2% 0.07 182.1)
-
Step 600
600
#388277
oklch(55.7% 0.076 182.3)
-
Step 700
700
#296E64
oklch(49.2% 0.071 182.2)
-
Step 800
800
#245951
oklch(42.6% 0.058 182.1)
-
Step 900
900 (this color)
#19403A
oklch(34.1% 0.046 182)
-
Step 950
950
#152B27
oklch(26.9% 0.029 181)
#19403A 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) | #3D3C3A | 0.049 |
| Deuteranopia (no green cones) | #37383B | 0.046 |
| Tritanopia (no blue cones) | #02413E | 0.014 |
| Achromatopsia (no color) | #3A3A3A | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #19403A
#19403A
oklch(34.1% 0.046 182)
- #4C2E36
#4C2E36
oklch(34.1% 0.046 2.4)
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 #19403A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.042
- Midnight Green #073B4C ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.044
- Evergreen #05472A ΔE 0.044
- Dark Teal #014D4E ΔE 0.046
- Charcoal #264653 ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.049
- Pakistan Green #283618 ΔE 0.053
Use #19403A 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.