#347CA5
Closest named color: Cerulean (#457B9D). oklch(55.9% 0.095 237), rgb(52, 124, 165).
Aa
White text reads best on this color (4.59:1).
About this color
#347CA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.095 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.017 away. White text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.57:1 |
| White text | 4.59:1 |
Values
| HEX | #347CA5 |
| RGB | rgb(52, 124, 165) |
| HSL | hsl(202, 52%, 43%) |
| OKLCH | oklch(55.9% 0.095 237) |
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 #347CA5 | 4.59:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #347CA5 | 4.57:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #347CA5 text on white | 4.59:1 | AA | Lc 71.6 | Content text, not long reading |
| #347CA5 text on black | 4.57:1 | AA | Lc -30.0 | Non-text elements, placeholder text |
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
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C5D9
oklch(80.8% 0.043 237.3)
-
Step 400
400
#77A8C6
oklch(70.8% 0.068 235.9)
-
Step 500
500
#5291B8
oklch(63% 0.088 237.5)
-
Step 600
600 (this color)
#347CA5
oklch(55.9% 0.095 237)
-
Step 700
700
#25688D
oklch(49.2% 0.089 236.9)
-
Step 800
800
#215572
oklch(42.8% 0.073 236.5)
-
Step 900
900
#21465C
oklch(37.7% 0.057 237)
-
Step 950
950
#142936
oklch(27% 0.036 237.4)
#347CA5 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) | #697BA7 | 0.056 |
| Deuteranopia (no green cones) | #5970A4 | 0.047 |
| Tritanopia (no blue cones) | #00878A | 0.065 |
| Achromatopsia (no color) | #757575 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #347CA5
#347CA5
oklch(55.9% 0.095 237)
- #9E6538
#9E6538
oklch(55.9% 0.095 57.4)
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 #347CA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.017
- Dull Blue #49759C ΔE 0.025
- Nice Blue #107AB0 ΔE 0.026
- Stormy Blue #507B9C ΔE 0.027
- Flat Blue #3C73A8 ΔE 0.028
- Muted Blue #3B719F ΔE 0.031
- Steel Blue #4682B4 ΔE 0.033
- Ocean #017B92 ΔE 0.040
Use #347CA5 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.