#345C99
Closest named color: Denim Blue (#3B5B92). oklch(47.6% 0.109 258.6), rgb(52, 92, 153).
Aa
White text reads best on this color (6.69:1).
About this color
#345C99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.109 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.013 away. White text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.13:1 |
| White text | 6.69:1 |
Values
| HEX | #345C99 |
| RGB | rgb(52, 92, 153) |
| HSL | hsl(216, 49%, 40%) |
| OKLCH | oklch(47.6% 0.109 258.6) |
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 #345C99 | 6.69:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #345C99 | 3.13:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #345C99 text on white | 6.69:1 | AA | Lc 82.8 | Fine for body text |
| #345C99 text on black | 3.13:1 | AA large text | Lc -19.1 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ACC2E3
oklch(80.8% 0.053 258.4)
-
Step 400
400
#80A2D5
oklch(70.6% 0.084 258.3)
-
Step 500
500
#608ACA
oklch(63% 0.108 258.6)
-
Step 600
600
#4773B7
oklch(55.6% 0.117 258.8)
-
Step 700
700 (this color)
#345C99
oklch(47.6% 0.109 258.6)
-
Step 800
800
#2F4F80
oklch(42.8% 0.09 258.7)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950
#19273C
oklch(27.1% 0.044 258.3)
#345C99 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) | #41619B | 0.022 |
| Deuteranopia (no green cones) | #325898 | 0.012 |
| Tritanopia (no blue cones) | #006A73 | 0.089 |
| Achromatopsia (no color) | #5C5C5C | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #345C99
#345C99
oklch(47.6% 0.109 258.6)
- #7A5400
#7A5400
oklch(47.5% 0.099 78.4)
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 #345C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.013
- Dusky Blue #475F94 ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.029
- Denim #3B638C ΔE 0.034
- Dusk Blue #26538D ΔE 0.035
- Peacock Blue #016795 ΔE 0.041
- Twilight #4E518B ΔE 0.043
- Dusk #4E5481 ΔE 0.048
Use #345C99 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.