#345C78
Closest named color: YInMn Blue (#415A77). oklch(45.8% 0.064 240.7), rgb(52, 92, 120).
Aa
White text reads best on this color (7.12:1).
About this color
#345C78 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.064 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.015 away. White text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.94:1 |
| White text | 7.12:1 |
Values
| HEX | #345C78 |
| RGB | rgb(52, 92, 120) |
| HSL | hsl(205, 40%, 34%) |
| OKLCH | oklch(45.8% 0.064 240.7) |
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 #345C78 | 7.12:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #345C78 | 2.94:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #345C78 text on white | 7.12:1 | AAA | Lc 84.6 | Fine for body text |
| #345C78 text on black | 2.94:1 | Fails | Lc -17.4 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE6
oklch(88.4% 0.021 241.4)
-
Step 300
300
#ACC4D7
oklch(80.8% 0.038 241.9)
-
Step 400
400
#7FA6C3
oklch(70.7% 0.06 240.9)
-
Step 500
500
#5D90B4
oklch(63.2% 0.077 240.3)
-
Step 600
600
#4279A0
oklch(55.5% 0.084 241.4)
-
Step 700
700
#336689
oklch(49.1% 0.079 240.9)
-
Step 800
800 (this color)
#345C78
oklch(45.8% 0.064 240.7)
-
Step 900
900
#28455A
oklch(37.7% 0.05 241.3)
-
Step 950
950
#182935
oklch(27.2% 0.032 240.2)
#345C78 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) | #505C79 | 0.035 |
| Deuteranopia (no green cones) | #465578 | 0.028 |
| Tritanopia (no blue cones) | #046365 | 0.053 |
| Achromatopsia (no color) | #585858 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #345C78
#345C78
oklch(45.8% 0.064 240.7)
- #724F31
#724F31
oklch(45.9% 0.065 60.8)
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 #345C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.029
- Denim #3B638C ΔE 0.037
- Dusty Grape #545775 ΔE 0.042
- Petrol #005F6A ΔE 0.043
- Dusk #4E5481 ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.048
Use #345C78 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.