#03436F
Closest named color: Twilight Blue (#0A437A). oklch(37.2% 0.095 246.6), rgb(3, 67, 111).
Aa
White text reads best on this color (10.31:1).
About this color
#03436F is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.095 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.020 away. White text reads best on it, at 10.31:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.03:1 |
| White text | 10.31:1 |
Values
| HEX | #03436F |
| RGB | rgb(3, 67, 111) |
| HSL | hsl(204, 95%, 22%) |
| OKLCH | oklch(37.2% 0.095 246.6) |
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 #03436F | 10.31:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #03436F | 2.03:1 | Fails | Lc 10.5 | Not readable |
| #03436F text on white | 10.31:1 | AAA | Lc 93.4 | Preferred for body text |
| #03436F text on black | 2.03:1 | Fails | Lc -9.1 | 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 900.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9CC6ED
oklch(81% 0.071 246.8)
-
Step 400
400
#61A7E4
oklch(70.7% 0.114 246.6)
-
Step 500
500
#2B8FDC
oklch(63.1% 0.146 246.8)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900 (this color)
#03436F
oklch(37.2% 0.095 246.6)
-
Step 950
950
#082842
oklch(26.9% 0.061 247.3)
#03436F 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) | #2D4571 | 0.034 |
| Deuteranopia (no green cones) | #1D3C6E | 0.024 |
| Tritanopia (no blue cones) | #004E53 | 0.068 |
| Achromatopsia (no color) | #404040 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03436F
#03436F
oklch(37.2% 0.095 246.6)
- #5D3600
#5D3600
oklch(37.3% 0.083 66.5)
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 #03436F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.020
- Marine Blue #01386A ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.046
- Light Navy #155084 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.054
- Charcoal #264653 ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
Use #03436F 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.