#347CA0
Closest named color: Cerulean (#457B9D). oklch(55.7% 0.09 233.5), rgb(52, 124, 160).
Aa
White text reads best on this color (4.62:1).
About this color
#347CA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.090 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.014 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.53:1 |
| White text | 4.62:1 |
Values
| HEX | #347CA0 |
| RGB | rgb(52, 124, 160) |
| HSL | hsl(200, 51%, 42%) |
| OKLCH | oklch(55.7% 0.09 233.5) |
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 #347CA0 | 4.62:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #347CA0 | 4.53:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #347CA0 text on white | 4.62:1 | AA | Lc 71.9 | Content text, not long reading |
| #347CA0 text on black | 4.53:1 | AA | Lc -29.8 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A8C6D7
oklch(81% 0.04 232.8)
-
Step 400
400
#78A8C3
oklch(70.7% 0.065 233.5)
-
Step 500
500
#5292B4
oklch(63.1% 0.083 233.4)
-
Step 600
600 (this color)
#347CA0
oklch(55.7% 0.09 233.5)
-
Step 700
700
#256889
oklch(49% 0.085 233.8)
-
Step 800
800
#21556F
oklch(42.7% 0.07 233.5)
-
Step 900
900
#21465A
oklch(37.6% 0.054 234.4)
-
Step 950
950
#142935
oklch(26.9% 0.035 235.2)
#347CA0 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) | #6A7BA2 | 0.058 |
| Deuteranopia (no green cones) | #5C709F | 0.049 |
| Tritanopia (no blue cones) | #008688 | 0.059 |
| Achromatopsia (no color) | #757575 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #347CA0
#347CA0
oklch(55.7% 0.09 233.5)
- #9D643E
#9D643E
oklch(55.7% 0.091 53.5)
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 #347CA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.014
- Dull Blue #49759C ΔE 0.025
- Stormy Blue #507B9C ΔE 0.025
- Nice Blue #107AB0 ΔE 0.032
- Muted Blue #3B719F ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.032
- Ocean #017B92 ΔE 0.033
- Metallic Blue #4F738E ΔE 0.037
Use #347CA0 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.