#174173
Closest named color: Twilight Blue (#0A437A). oklch(37.4% 0.097 254.9), rgb(23, 65, 115).
Aa
White text reads best on this color (10.29:1).
About this color
#174173 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.097 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.013 away. White text reads best on it, at 10.29:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.04:1 |
| White text | 10.29:1 |
Values
| HEX | #174173 |
| RGB | rgb(23, 65, 115) |
| HSL | hsl(213, 67%, 27%) |
| OKLCH | oklch(37.4% 0.097 254.9) |
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 #174173 | 10.29:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #174173 | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #174173 text on white | 10.29:1 | AAA | Lc 93.6 | Preferred for body text |
| #174173 text on black | 2.04:1 | Fails | Lc -9.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A1C3F0
oklch(80.8% 0.074 255.6)
-
Step 400
400
#6DA3E8
oklch(70.6% 0.117 255.1)
-
Step 500
500
#438AE1
oklch(63% 0.15 255)
-
Step 600
600
#2072CF
oklch(55.5% 0.163 255)
-
Step 700
700
#115FB3
oklch(49% 0.151 255)
-
Step 800
800
#134E91
oklch(42.6% 0.125 255)
-
Step 900
900 (this color)
#174173
oklch(37.4% 0.097 254.9)
-
Step 950
950
#0F2744
oklch(27% 0.062 254.6)
#174173 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) | #294575 | 0.023 |
| Deuteranopia (no green cones) | #193D72 | 0.012 |
| Tritanopia (no blue cones) | #004D54 | 0.075 |
| Achromatopsia (no color) | #404040 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174173
#174173
oklch(37.4% 0.097 254.9)
- #593A00
#593A00
oklch(37.5% 0.079 75.4)
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 #174173, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.013
- Marine Blue #01386A ΔE 0.035
- Light Navy #155084 ΔE 0.050
- Cobalt #1E488F ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.058
- Charcoal #264653 ΔE 0.063
Use #174173 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.