#0342B3
Closest named color: Sapphire (#2138AB). oklch(42.6% 0.188 261.7), rgb(3, 66, 179).
Aa
White text reads best on this color (8.62:1).
About this color
#0342B3 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.188 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.028 away. White text reads best on it, at 8.62:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.43:1 |
| White text | 8.62:1 |
Values
| HEX | #0342B3 |
| RGB | rgb(3, 66, 179) |
| HSL | hsl(219, 97%, 36%) |
| OKLCH | oklch(42.6% 0.188 261.7) |
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 #0342B3 | 8.62:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #0342B3 | 2.43:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #0342B3 text on white | 8.62:1 | AAA | Lc 88.6 | Fine for body text |
| #0342B3 text on black | 2.43:1 | Fails | Lc -13.6 | 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
#DFEBFF
oklch(93.7% 0.03 260.7)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4082FF
oklch(63.1% 0.198 261.6)
-
Step 600
600
#0862FF
oklch(55.7% 0.245 261.7)
-
Step 700
700
#0050DB
oklch(49% 0.222 261.7)
-
Step 800
800 (this color)
#0342B3
oklch(42.6% 0.188 261.7)
-
Step 900
900
#0E3A8E
oklch(37.7% 0.147 261.7)
-
Step 950
950
#0A2353
oklch(27% 0.093 261.7)
#0342B3 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) | #0054B7 | 0.045 |
| Deuteranopia (no green cones) | #0044B1 | 0.006 |
| Tritanopia (no blue cones) | #006074 | 0.143 |
| Achromatopsia (no color) | #4C4C4C | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0342B3
#0342B3
oklch(42.6% 0.188 261.7)
- #674900
#674900
oklch(42.7% 0.088 81.6)
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 #0342B3, closest first.
No curated palette has a color within ΔE 0.04 of #0342B3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.028
- Blue Blue #2242C7 ΔE 0.037
- Majorelle Blue #3F37C9 ΔE 0.062
- Cobalt #1E488F ΔE 0.063
- Blueberry #464196 ΔE 0.077
- Indigo Blue #3A18B1 ΔE 0.079
- True Blue #010FCC ΔE 0.081
- Dusk Blue #26538D ΔE 0.083
Use #0342B3 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.