#174BA8
Closest named color: Cobalt (#1E488F). oklch(43.8% 0.16 261.1), rgb(23, 75, 168).
Aa
White text reads best on this color (8.05:1).
About this color
#174BA8 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.160 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.041 away. White text reads best on it, at 8.05:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #174BA8 |
| RGB | rgb(23, 75, 168) |
| HSL | hsl(218, 76%, 37%) |
| OKLCH | oklch(43.8% 0.16 261.1) |
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 #174BA8 | 8.05:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #174BA8 | 2.60:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #174BA8 text on white | 8.05:1 | AAA | Lc 87.3 | Fine for body text |
| #174BA8 text on black | 2.60:1 | Fails | Lc -14.8 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9FC2FD
oklch(81% 0.092 260.7)
-
Step 400
400
#6A9FFD
oklch(70.7% 0.149 261.1)
-
Step 500
500
#4183FB
oklch(63.1% 0.192 261.2)
-
Step 600
600
#2169EA
oklch(55.6% 0.208 261.1)
-
Step 700
700
#1456CB
oklch(49% 0.193 261.2)
-
Step 800
800 (this color)
#174BA8
oklch(43.8% 0.16 261.1)
-
Step 900
900
#173D82
oklch(37.6% 0.124 261.1)
-
Step 950
950
#0E254C
oklch(27.1% 0.078 260.3)
#174BA8 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) | #0057AB | 0.031 |
| Deuteranopia (no green cones) | #004AA6 | 0.011 |
| Tritanopia (no blue cones) | #006272 | 0.122 |
| Achromatopsia (no color) | #505050 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174BA8
#174BA8
oklch(43.8% 0.16 261.1)
- #6B4C00
#6B4C00
oklch(43.9% 0.09 81.6)
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 #174BA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.041
- Sapphire #2138AB ΔE 0.045
- Dusk Blue #26538D ΔE 0.053
- Blue Blue #2242C7 ΔE 0.054
- Blueberry #464196 ΔE 0.059
- Light Navy #155084 ΔE 0.063
- Deep Sea Blue #015482 ΔE 0.071
- Denim Blue #3B5B92 ΔE 0.072
Use #174BA8 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.