#034B9F
Closest named color: Cobalt (#1E488F). oklch(42.7% 0.151 257.2), rgb(3, 75, 159).
Aa
White text reads best on this color (8.36:1).
About this color
#034B9F is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.151 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.51:1 |
| White text | 8.36:1 |
Values
| HEX | #034B9F |
| RGB | rgb(3, 75, 159) |
| HSL | hsl(212, 96%, 32%) |
| OKLCH | oklch(42.7% 0.151 257.2) |
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 #034B9F | 8.36:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #034B9F | 2.51:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #034B9F text on white | 8.36:1 | AAA | Lc 88.1 | Fine for body text |
| #034B9F text on black | 2.51:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3F9
oklch(80.9% 0.087 257.2)
-
Step 400
400
#65A2F7
oklch(70.8% 0.14 256.9)
-
Step 500
500
#3787F3
oklch(63% 0.18 257.1)
-
Step 600
600
#076EE2
oklch(55.6% 0.195 257.1)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800 (this color)
#034B9F
oklch(42.7% 0.151 257.2)
-
Step 900
900
#10407E
oklch(37.8% 0.117 257)
-
Step 950
950
#0B264A
oklch(27.1% 0.074 256.8)
#034B9F 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) | #0A55A2 | 0.028 |
| Deuteranopia (no green cones) | #00489D | 0.009 |
| Tritanopia (no blue cones) | #00606D | 0.114 |
| Achromatopsia (no color) | #4E4E4E | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #034B9F
#034B9F
oklch(42.7% 0.151 257.2)
- #6A4700
#6A4700
oklch(42.6% 0.089 76.7)
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 #034B9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Dusk Blue #26538D ΔE 0.045
- Light Navy #155084 ΔE 0.049
- Sapphire #2138AB ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.058
- Blueberry #464196 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.063
- Light Navy Blue #2E5A88 ΔE 0.069
Use #034B9F 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.