#12584E
Closest named color: Dark Blue Green (#005249). oklch(41.6% 0.068 180.9), rgb(18, 88, 78).
Aa
White text reads best on this color (8.29:1).
About this color
#12584E is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.068 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.023 away. White text reads best on it, at 8.29:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #12584E |
| RGB | rgb(18, 88, 78) |
| HSL | hsl(171, 66%, 21%) |
| OKLCH | oklch(41.6% 0.068 180.9) |
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 #12584E | 8.29:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #12584E | 2.53:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #12584E text on white | 8.29:1 | AAA | Lc 88.3 | Fine for body text |
| #12584E text on black | 2.53:1 | Fails | Lc -13.9 | 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 800.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
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
#A5CAC2
oklch(81% 0.041 180.6)
-
Step 400
400
#73AEA3
oklch(70.7% 0.064 181.4)
-
Step 500
500
#4A9A8C
oklch(63.2% 0.082 180.6)
-
Step 600
600
#258476
oklch(55.6% 0.089 180.9)
-
Step 700
700
#157063
oklch(49.2% 0.083 180.5)
-
Step 800
800 (this color)
#12584E
oklch(41.6% 0.068 180.9)
-
Step 900
900
#1B4B43
oklch(37.7% 0.054 180.6)
-
Step 950
950
#112C27
oklch(27% 0.035 179.9)
#12584E 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) | #54524E | 0.073 |
| Deuteranopia (no green cones) | #4A4B4F | 0.069 |
| Tritanopia (no blue cones) | #005A55 | 0.012 |
| Achromatopsia (no color) | #4E4E4E | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12584E
#12584E
oklch(41.6% 0.068 180.9)
- #6A3B4A
#6A3B4A
oklch(41.5% 0.069 0)
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 #12584E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.023
- Deep Teal #00555A ΔE 0.026
- Dark Slate Gray #2F4F4F ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.038
- Dark Teal #014D4E ΔE 0.039
- Petrol #005F6A ΔE 0.045
- Spruce #0A5F38 ΔE 0.048
- Pine #2B5D34 ΔE 0.050
Use #12584E 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.