#174B57
Closest named color: Charcoal (#264653). oklch(38.4% 0.057 216.1), rgb(23, 75, 87).
Aa
White text reads best on this color (9.63:1).
About this color
#174B57 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.057 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.018 away. White text reads best on it, at 9.63:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.18:1 |
| White text | 9.63:1 |
Values
| HEX | #174B57 |
| RGB | rgb(23, 75, 87) |
| HSL | hsl(191, 58%, 22%) |
| OKLCH | oklch(38.4% 0.057 216.1) |
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 #174B57 | 9.63:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #174B57 | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #174B57 text on white | 9.63:1 | AAA | Lc 92.1 | Preferred for body text |
| #174B57 text on black | 2.18:1 | Fails | Lc -10.3 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DDE3
oklch(88.4% 0.024 216.7)
-
Step 300
300
#A2C8D2
oklch(80.9% 0.043 215.5)
-
Step 400
400
#6DACBC
oklch(70.8% 0.069 215.6)
-
Step 500
500
#4097AB
oklch(63.2% 0.087 215.4)
-
Step 600
600
#118197
oklch(55.7% 0.095 215.9)
-
Step 700
700
#006C80
oklch(49% 0.087 216.4)
-
Step 800
800
#085969
oklch(42.8% 0.074 216.1)
-
Step 900
900 (this color)
#174B57
oklch(38.4% 0.057 216.1)
-
Step 950
950
#0E2B32
oklch(27.1% 0.037 216.1)
#174B57 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) | #434958 | 0.051 |
| Deuteranopia (no green cones) | #3A4257 | 0.045 |
| Tritanopia (no blue cones) | #004F4F | 0.025 |
| Achromatopsia (no color) | #454545 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174B57
#174B57
oklch(38.4% 0.057 216.1)
- #5E382E
#5E382E
oklch(38.4% 0.057 35.5)
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 #174B57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.018
- Dark Teal #014D4E ΔE 0.022
- Dark Grey Blue #29465B ΔE 0.025
- Dark Slate Gray #2F4F4F ΔE 0.032
- Deep Teal #00555A ΔE 0.032
- Dark Blue Green #005249 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.052
Use #174B57 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.