#17434B
Closest named color: Charcoal (#264653). oklch(35.6% 0.049 211.5), rgb(23, 67, 75).
Aa
White text reads best on this color (10.81:1).
About this color
#17434B is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.049 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.023 away. White text reads best on it, at 10.81:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.94:1 |
| White text | 10.81:1 |
Values
| HEX | #17434B |
| RGB | rgb(23, 67, 75) |
| HSL | hsl(189, 53%, 19%) |
| OKLCH | oklch(35.6% 0.049 211.5) |
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 #17434B | 10.81:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #17434B | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #17434B text on white | 10.81:1 | AAA | Lc 94.9 | Preferred for body text |
| #17434B text on black | 1.94:1 | Fails | Lc -7.7 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A6C8CE
oklch(81% 0.037 209.5)
-
Step 400
400
#74ABB6
oklch(70.7% 0.06 211.5)
-
Step 500
500
#4D96A4
oklch(63.2% 0.076 211.6)
-
Step 600
600
#2B808F
oklch(55.6% 0.082 211.6)
-
Step 700
700
#1C6C7A
oklch(49.1% 0.077 212.1)
-
Step 800
800
#1A5863
oklch(42.7% 0.064 211.8)
-
Step 900
900 (this color)
#17434B
oklch(35.6% 0.049 211.5)
-
Step 950
950
#122B2F
oklch(27.1% 0.032 209)
#17434B 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) | #3D414B | 0.046 |
| Deuteranopia (no green cones) | #353B4B | 0.042 |
| Tritanopia (no blue cones) | #004645 | 0.021 |
| Achromatopsia (no color) | #3D3D3D | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17434B
#17434B
oklch(35.6% 0.049 211.5)
- #53322C
#53322C
oklch(35.6% 0.05 30.9)
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 #17434B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.029
- Midnight Green #073B4C ΔE 0.032
- Dark Teal #014D4E ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.035
- Onyx #343A40 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.050
Use #17434B 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.