#001817
Closest named color: Rich Navy (#001219). oklch(18.9% 0.032 191.2), rgb(0, 24, 23).
Aa
White text reads best on this color (18.37:1).
About this color
#001817 is a very dark, muted teal or cyan. In OKLCH its lightness is 19%, its chroma 0.032 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.026 away. White text reads best on it, at 18.37:1.
| Hue family | Teals and cyans |
| Lightness | very dark (19%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.14:1 |
| White text | 18.37:1 |
Values
| HEX | #001817 |
| RGB | rgb(0, 24, 23) |
| HSL | hsl(178, 100%, 5%) |
| OKLCH | oklch(18.9% 0.032 191.2) |
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 #001817 | 18.37:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #001817 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #001817 text on white | 18.37:1 | AAA | Lc 104.9 | Preferred for body text |
| #001817 text on black | 1.14:1 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CADEDC
oklch(88.5% 0.022 189.5)
-
Step 300
300
#A5C9C6
oklch(80.9% 0.039 190.2)
-
Step 400
400
#72ADAA
oklch(70.6% 0.061 191.8)
-
Step 500
500
#499995
oklch(63.2% 0.079 191)
-
Step 600
600
#24837F
oklch(55.6% 0.085 190.8)
-
Step 700
700
#136F6C
oklch(49.2% 0.08 191.4)
-
Step 800
800
#155A58
oklch(42.6% 0.066 192.1)
-
Step 900
900
#1B4A48
oklch(37.6% 0.051 191.4)
-
Step 950
950 (this color)
#001817
oklch(18.9% 0.032 191.2)
#001817 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) | #161617 | 0.035 |
| Deuteranopia (no green cones) | #121317 | 0.033 |
| Tritanopia (no blue cones) | #001918 | 0.004 |
| Achromatopsia (no color) | #141414 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001817
#001817
oklch(18.9% 0.032 191.2)
- #200D10
#200D10
oklch(18.9% 0.033 10.6)
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 #001817, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.026
- Almost Black #070D0D ΔE 0.043
- Rich Black #0D1B2A ΔE 0.045
- Dark #1B2431 ΔE 0.077
- Jet #212529 ΔE 0.079
- Oxford Blue #1B263B ΔE 0.092
- Very Dark Brown #1D0200 ΔE 0.093
- Dark Forest Green #002D04 ΔE 0.095
Use #001817 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.