#174F5F
Closest named color: Deep Teal (#00555A). oklch(39.9% 0.062 220.8), rgb(23, 79, 95).
Aa
White text reads best on this color (9.05:1).
About this color
#174F5F is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.062 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.025 away. White text reads best on it, at 9.05:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.32:1 |
| White text | 9.05:1 |
Values
| HEX | #174F5F |
| RGB | rgb(23, 79, 95) |
| HSL | hsl(193, 61%, 23%) |
| OKLCH | oklch(39.9% 0.062 220.8) |
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 #174F5F | 9.05:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #174F5F | 2.32:1 | Fails | Lc 13.4 | Not readable |
| #174F5F text on white | 9.05:1 | AAA | Lc 90.5 | Preferred for body text |
| #174F5F text on black | 2.32:1 | Fails | Lc -11.8 | 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
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#A0C8D6
oklch(80.9% 0.047 221.2)
-
Step 400
400
#69ACC1
oklch(70.8% 0.075 220)
-
Step 500
500
#3897B2
oklch(63.2% 0.096 220.3)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900 (this color)
#174F5F
oklch(39.9% 0.062 220.8)
-
Step 950
950
#0C2B34
oklch(27.1% 0.04 220.3)
#174F5F 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) | #454D60 | 0.051 |
| Deuteranopia (no green cones) | #3B465F | 0.044 |
| Tritanopia (no blue cones) | #005454 | 0.031 |
| Achromatopsia (no color) | #494949 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174F5F
#174F5F
oklch(39.9% 0.062 220.8)
- #643C2D
#643C2D
oklch(40% 0.062 41.2)
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 #174F5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.025
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal #264653 ΔE 0.031
- Dark Teal #014D4E ΔE 0.033
- Dark Slate Gray #2F4F4F ΔE 0.033
- Dark Blue Green #005249 ΔE 0.045
- Petrol #005F6A ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.058
Use #174F5F 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.