#174F57
Closest named color: Deep Teal (#00555A). oklch(39.5% 0.058 208.6), rgb(23, 79, 87).
Aa
White text reads best on this color (9.16:1).
About this color
#174F57 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.058 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.019 away. White text reads best on it, at 9.16:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #174F57 |
| RGB | rgb(23, 79, 87) |
| HSL | hsl(188, 58%, 22%) |
| OKLCH | oklch(39.5% 0.058 208.6) |
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 #174F57 | 9.16:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #174F57 | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #174F57 text on white | 9.16:1 | AAA | Lc 90.8 | Preferred for body text |
| #174F57 text on black | 2.29:1 | Fails | Lc -11.5 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE2
oklch(88.5% 0.024 209.8)
-
Step 300
300
#A1C9D0
oklch(80.9% 0.043 209.4)
-
Step 400
400
#6AADB8
oklch(70.7% 0.07 209)
-
Step 500
500
#3A98A6
oklch(63% 0.089 208.9)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900 (this color)
#174F57
oklch(39.5% 0.058 208.6)
-
Step 950
950
#0D2B30
oklch(26.9% 0.036 210.1)
#174F57 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) | #484C58 | 0.056 |
| Deuteranopia (no green cones) | #3E4557 | 0.050 |
| Tritanopia (no blue cones) | #005351 | 0.022 |
| Achromatopsia (no color) | #484848 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174F57
#174F57
oklch(39.5% 0.058 208.6)
- #623A34
#623A34
oklch(39.5% 0.058 29.1)
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 #174F57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.019
- Dark Teal #014D4E ΔE 0.021
- Dark Slate Gray #2F4F4F ΔE 0.024
- Charcoal #264653 ΔE 0.029
- Dark Blue Green #005249 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.035
- Petrol #005F6A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.057
Use #174F57 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.