#174DA4
Closest named color: Cobalt (#1E488F). oklch(43.9% 0.152 259.9), rgb(23, 77, 164).
Aa
White text reads best on this color (7.97:1).
About this color
#174DA4 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.152 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.036 away. White text reads best on it, at 7.97:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #174DA4 |
| RGB | rgb(23, 77, 164) |
| HSL | hsl(217, 75%, 37%) |
| OKLCH | oklch(43.9% 0.152 259.9) |
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 #174DA4 | 7.97:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #174DA4 | 2.63:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #174DA4 text on white | 7.97:1 | AAA | Lc 87.1 | Fine for body text |
| #174DA4 text on black | 2.63:1 | Fails | Lc -15.0 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#9FC2FA
oklch(80.9% 0.088 259.7)
-
Step 400
400
#6AA0F8
oklch(70.7% 0.142 259.7)
-
Step 500
500
#4185F5
oklch(63.1% 0.182 259.9)
-
Step 600
600
#206BE4
oklch(55.5% 0.198 260)
-
Step 700
700
#1259C6
oklch(49.2% 0.183 259.8)
-
Step 800
800 (this color)
#174DA4
oklch(43.9% 0.152 259.9)
-
Step 900
900
#173E7F
oklch(37.6% 0.119 260.1)
-
Step 950
950
#0F254A
oklch(27% 0.074 260.2)
#174DA4 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) | #0B57A7 | 0.027 |
| Deuteranopia (no green cones) | #004BA2 | 0.013 |
| Tritanopia (no blue cones) | #006271 | 0.115 |
| Achromatopsia (no color) | #515151 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174DA4
#174DA4
oklch(43.9% 0.152 259.9)
- #6C4C00
#6C4C00
oklch(44% 0.091 80.8)
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 #174DA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.036
- Dusk Blue #26538D ΔE 0.045
- Sapphire #2138AB ΔE 0.051
- Light Navy #155084 ΔE 0.055
- Blueberry #464196 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.064
Use #174DA4 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.