#174C66
Closest named color: Dark Grey Blue (#29465B). oklch(39.5% 0.07 234.1), rgb(23, 76, 102).
Aa
White text reads best on this color (9.28:1).
About this color
#174C66 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.070 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 9.28:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #174C66 |
| RGB | rgb(23, 76, 102) |
| HSL | hsl(200, 63%, 25%) |
| OKLCH | oklch(39.5% 0.07 234.1) |
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 #174C66 | 9.28:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #174C66 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #174C66 text on white | 9.28:1 | AAA | Lc 91.2 | Preferred for body text |
| #174C66 text on black | 2.26:1 | Fails | Lc -11.2 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#A0C7DE
oklch(80.9% 0.053 234.2)
-
Step 400
400
#6AAACD
oklch(70.8% 0.083 233.6)
-
Step 500
500
#3A94C0
oklch(63.2% 0.107 233.4)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900 (this color)
#174C66
oklch(39.5% 0.07 234.1)
-
Step 950
950
#0D2A39
oklch(27.1% 0.044 234.3)
#174C66 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) | #3F4B67 | 0.043 |
| Deuteranopia (no green cones) | #354466 | 0.037 |
| Tritanopia (no blue cones) | #005355 | 0.044 |
| Achromatopsia (no color) | #474747 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174C66
#174C66
oklch(39.5% 0.07 234.1)
- #633B1F
#633B1F
oklch(39.4% 0.07 54.1)
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 #174C66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.033
- Deep Teal #00555A ΔE 0.041
- Dark Teal #014D4E ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.050
- Light Navy #155084 ΔE 0.050
Use #174C66 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.