#174E5A
Closest named color: Deep Teal (#00555A). oklch(39.4% 0.059 215.2), rgb(23, 78, 90).
Aa
White text reads best on this color (9.23:1).
About this color
#174E5A is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.059 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.024 away. White text reads best on it, at 9.23:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.27:1 |
| White text | 9.23:1 |
Values
| HEX | #174E5A |
| RGB | rgb(23, 78, 90) |
| HSL | hsl(191, 59%, 22%) |
| OKLCH | oklch(39.4% 0.059 215.2) |
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 #174E5A | 9.23:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #174E5A | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #174E5A text on white | 9.23:1 | AAA | Lc 91.0 | Preferred for body text |
| #174E5A text on black | 2.27:1 | Fails | Lc -11.3 | 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
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A1C8D3
oklch(80.8% 0.044 216.8)
-
Step 400
400
#6AACBC
oklch(70.6% 0.071 214.9)
-
Step 500
500
#3B97AC
oklch(63.1% 0.091 215.6)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900 (this color)
#174E5A
oklch(39.4% 0.059 215.2)
-
Step 950
950
#0D2B32
oklch(27% 0.037 215.6)
#174E5A 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) | #464B5B | 0.054 |
| Deuteranopia (no green cones) | #3C445A | 0.048 |
| Tritanopia (no blue cones) | #005252 | 0.024 |
| Achromatopsia (no color) | #474747 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174E5A
#174E5A
oklch(39.4% 0.059 215.2)
- #623A30
#623A30
oklch(39.4% 0.06 34.8)
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 #174E5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.024
- Dark Teal #014D4E ΔE 0.025
- Charcoal #264653 ΔE 0.026
- Dark Slate Gray #2F4F4F ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.029
- Dark Blue Green #005249 ΔE 0.038
- Petrol #005F6A ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.057
Use #174E5A 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.