#174188
Closest named color: Cobalt (#1E488F). oklch(39% 0.128 260.3), rgb(23, 65, 136).
Aa
White text reads best on this color (9.77:1).
About this color
#174188 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.128 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.024 away. White text reads best on it, at 9.77:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.14:1 |
| White text | 9.77:1 |
Values
| HEX | #174188 |
| RGB | rgb(23, 65, 136) |
| HSL | hsl(218, 71%, 31%) |
| OKLCH | oklch(39% 0.128 260.3) |
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 #174188 | 9.77:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #174188 | 2.14:1 | Fails | Lc 11.7 | Not readable |
| #174188 text on white | 9.77:1 | AAA | Lc 92.2 | Preferred for body text |
| #174188 text on black | 2.14:1 | Fails | Lc -10.2 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3B83FD
oklch(63% 0.196 260.3)
-
Step 600
600
#1769ED
oklch(55.7% 0.213 260.4)
-
Step 700
700
#0756CE
oklch(49.1% 0.198 260.4)
-
Step 800
800
#0C47A6
oklch(42.6% 0.164 260.4)
-
Step 900
900 (this color)
#174188
oklch(39% 0.128 260.3)
-
Step 950
950
#0D254D
oklch(27.1% 0.08 260.1)
#174188 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) | #13498B | 0.022 |
| Deuteranopia (no green cones) | #003F87 | 0.014 |
| Tritanopia (no blue cones) | #00525E | 0.098 |
| Achromatopsia (no color) | #444444 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174188
#174188
oklch(39% 0.128 260.3)
- #5B3F00
#5B3F00
oklch(38.9% 0.081 80.2)
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 #174188, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Twilight Blue #0A437A ΔE 0.026
- Light Navy #155084 ΔE 0.045
- Dusk Blue #26538D ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.058
- Marine Blue #01386A ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
- Sapphire #2138AB ΔE 0.062
Use #174188 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.