#12423B
Closest named color: Evergreen (#05472A). oklch(34.5% 0.052 181.6), rgb(18, 66, 59).
Aa
White text reads best on this color (11.24:1).
About this color
#12423B is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.052 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Evergreen (#05472A), ΔE 0.039 away. White text reads best on it, at 11.24:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Evergreen (#05472A) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #12423B |
| RGB | rgb(18, 66, 59) |
| HSL | hsl(171, 57%, 16%) |
| OKLCH | oklch(34.5% 0.052 181.6) |
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 #12423B | 11.24:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #12423B | 1.86:1 | Fails | Lc 8.2 | Not readable |
| #12423B text on white | 11.24:1 | AAA | Lc 95.7 | Preferred for body text |
| #12423B text on black | 1.86:1 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A6C9C2
oklch(80.8% 0.039 181.8)
-
Step 400
400
#74AEA3
oklch(70.8% 0.063 181.2)
-
Step 500
500
#4B998D
oklch(63% 0.08 182.4)
-
Step 600
600
#278477
oklch(55.6% 0.087 181.8)
-
Step 700
700
#187064
oklch(49.3% 0.081 181.4)
-
Step 800
800
#185B51
oklch(42.7% 0.068 180.9)
-
Step 900
900 (this color)
#12423B
oklch(34.5% 0.052 181.6)
-
Step 950
950
#122C27
oklch(27.1% 0.034 179.6)
#12423B 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) | #3F3E3B | 0.056 |
| Deuteranopia (no green cones) | #38393C | 0.053 |
| Tritanopia (no blue cones) | #004340 | 0.011 |
| Achromatopsia (no color) | #3B3B3B | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12423B
#12423B
oklch(34.5% 0.052 181.6)
- #502D37
#502D37
oklch(34.5% 0.053 1.8)
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 #12423B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Evergreen #05472A ΔE 0.039
- Dark Teal #014D4E ΔE 0.041
- Midnight Green #073B4C ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.048
- Charcoal #264653 ΔE 0.048
- Onyx #343A40 ΔE 0.049
- Dark Blue Green #005249 ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.053
Use #12423B 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.