#0347AB
Closest named color: Sapphire (#2138AB). oklch(42.9% 0.172 260), rgb(3, 71, 171).
Aa
White text reads best on this color (8.42:1).
About this color
#0347AB is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.172 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.035 away. White text reads best on it, at 8.42:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.49:1 |
| White text | 8.42:1 |
Values
| HEX | #0347AB |
| RGB | rgb(3, 71, 171) |
| HSL | hsl(216, 97%, 34%) |
| OKLCH | oklch(42.9% 0.172 260) |
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 #0347AB | 8.42:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #0347AB | 2.49:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #0347AB text on white | 8.42:1 | AAA | Lc 88.2 | Fine for body text |
| #0347AB text on black | 2.49:1 | Fails | Lc -14.0 | Not readable |
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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3883FF
oklch(63% 0.199 260)
-
Step 600
600
#0668F2
oklch(55.7% 0.222 259.9)
-
Step 700
700
#0056CF
oklch(49.1% 0.2 260)
-
Step 800
800 (this color)
#0347AB
oklch(42.9% 0.172 260)
-
Step 900
900
#0F3D87
oklch(37.8% 0.133 260)
-
Step 950
950
#0A244F
oklch(26.9% 0.085 260)
#0347AB 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) | #0055AE | 0.037 |
| Deuteranopia (no green cones) | #0046A9 | 0.005 |
| Tritanopia (no blue cones) | #006172 | 0.130 |
| Achromatopsia (no color) | #4D4D4D | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0347AB
#0347AB
oklch(42.9% 0.172 260)
- #694900
#694900
oklch(43% 0.089 79.8)
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 #0347AB, closest first.
No curated palette has a color within ΔE 0.04 of #0347AB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.035
- Cobalt #1E488F ΔE 0.047
- Blue Blue #2242C7 ΔE 0.049
- Dusk Blue #26538D ΔE 0.066
- Blueberry #464196 ΔE 0.068
- Light Navy #155084 ΔE 0.071
- Majorelle Blue #3F37C9 ΔE 0.072
- Deep Sea Blue #015482 ΔE 0.080
Use #0347AB 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.