#034F71
Closest named color: Deep Sea Blue (#015482). oklch(40.5% 0.086 236.3), rgb(3, 79, 113).
Aa
White text reads best on this color (8.89:1).
About this color
#034F71 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.086 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.030 away. White text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #034F71 |
| RGB | rgb(3, 79, 113) |
| HSL | hsl(199, 95%, 23%) |
| OKLCH | oklch(40.5% 0.086 236.3) |
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 #034F71 | 8.89:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #034F71 | 2.36:1 | Fails | Lc 14.1 | Not readable |
| #034F71 text on white | 8.89:1 | AAA | Lc 89.9 | Fine for body text |
| #034F71 text on black | 2.36:1 | Fails | Lc -12.4 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A2C6DD
oklch(80.8% 0.05 236.3)
-
Step 400
400
#6EA9CC
oklch(70.8% 0.08 235.6)
-
Step 500
500
#4393BF
oklch(63.2% 0.102 235.7)
-
Step 600
600
#1A7CAC
oklch(55.6% 0.112 236.5)
-
Step 700
700
#076893
oklch(49% 0.104 236.3)
-
Step 800
800 (this color)
#034F71
oklch(40.5% 0.086 236.3)
-
Step 900
900
#174760
oklch(37.8% 0.066 235.3)
-
Step 950
950
#0F2938
oklch(26.8% 0.042 236.6)
#034F71 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) | #3E4F73 | 0.049 |
| Deuteranopia (no green cones) | #304670 | 0.039 |
| Tritanopia (no blue cones) | #00585B | 0.054 |
| Achromatopsia (no color) | #4A4A4A | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #034F71
#034F71
oklch(40.5% 0.086 236.3)
- #6B3B12
#6B3B12
oklch(40.4% 0.086 56.7)
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 #034F71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.030
- Light Navy #155084 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.043
- Deep Teal #00555A ΔE 0.049
- Charcoal #264653 ΔE 0.053
- Dusk Blue #26538D ΔE 0.054
- Petrol #005F6A ΔE 0.056
Use #034F71 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.