#345E99
Closest named color: Denim Blue (#3B5B92). oklch(48.1% 0.107 257.2), rgb(52, 94, 153).
Aa
White text reads best on this color (6.54:1).
About this color
#345E99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.107 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.014 away. White text reads best on it, at 6.54:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.20:1 |
| White text | 6.54:1 |
Values
| HEX | #345E99 |
| RGB | rgb(52, 94, 153) |
| HSL | hsl(215, 49%, 40%) |
| OKLCH | oklch(48.1% 0.107 257.2) |
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 #345E99 | 6.54:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #345E99 | 3.20:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #345E99 text on white | 6.54:1 | AA | Lc 82.2 | Fine for body text |
| #345E99 text on black | 3.20:1 | AA large text | Lc -19.7 | 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
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ACC2E2
oklch(80.8% 0.051 257.7)
-
Step 400
400
#80A3D4
oklch(70.8% 0.082 256.9)
-
Step 500
500
#5F8BC9
oklch(63.1% 0.106 257.1)
-
Step 600
600
#4574B5
oklch(55.6% 0.114 256.8)
-
Step 700
700 (this color)
#345E99
oklch(48.1% 0.107 257.2)
-
Step 800
800
#2E4F7F
oklch(42.7% 0.089 257.8)
-
Step 900
900
#294266
oklch(37.7% 0.069 257.5)
-
Step 950
950
#18273C
oklch(27% 0.044 256.9)
#345E99 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) | #44639B | 0.024 |
| Deuteranopia (no green cones) | #365998 | 0.014 |
| Tritanopia (no blue cones) | #006C74 | 0.088 |
| Achromatopsia (no color) | #5D5D5D | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #345E99
#345E99
oklch(48.1% 0.107 257.2)
- #7D5500
#7D5500
oklch(48.1% 0.101 77.2)
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 #345E99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.014
- Dusky Blue #475F94 ΔE 0.023
- Denim #3B638C ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.030
- Peacock Blue #016795 ΔE 0.037
- Dusk Blue #26538D ΔE 0.040
- Twilight #4E518B ΔE 0.046
- Mid Blue #276AB3 ΔE 0.048
Use #345E99 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.