#174368
Closest named color: Twilight Blue (#0A437A). oklch(37.2% 0.08 247.5), rgb(23, 67, 104).
Aa
White text reads best on this color (10.29:1).
About this color
#174368 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.080 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 10.29:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #174368 |
| RGB | rgb(23, 67, 104) |
| HSL | hsl(207, 64%, 25%) |
| OKLCH | oklch(37.2% 0.08 247.5) |
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 #174368 | 10.29:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #174368 | 2.03:1 | Fails | Lc 10.3 | Not readable |
| #174368 text on white | 10.29:1 | AAA | Lc 93.6 | Preferred for body text |
| #174368 text on black | 2.03:1 | Fails | Lc -8.9 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A2C5E6
oklch(80.9% 0.06 247)
-
Step 400
400
#6FA6D9
oklch(70.7% 0.095 247.5)
-
Step 500
500
#458FCF
oklch(63.1% 0.122 247.3)
-
Step 600
600
#2078BC
oklch(55.7% 0.132 247.2)
-
Step 700
700
#1064A2
oklch(49% 0.123 247.5)
-
Step 800
800
#135284
oklch(42.7% 0.103 247.8)
-
Step 900
900 (this color)
#174368
oklch(37.2% 0.08 247.5)
-
Step 950
950
#10283E
oklch(27% 0.051 248.4)
#174368 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) | #32456A | 0.031 |
| Deuteranopia (no green cones) | #273D67 | 0.022 |
| Tritanopia (no blue cones) | #004C50 | 0.059 |
| Achromatopsia (no color) | #404040 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174368
#174368
oklch(37.2% 0.08 247.5)
- #5C3703
#5C3703
oklch(37.3% 0.08 67.7)
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 #174368, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.032
- Marine Blue #01386A ΔE 0.040
- Charcoal #264653 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.048
- Midnight Green #073B4C ΔE 0.054
- Light Navy #155084 ΔE 0.056
Use #174368 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.