#03556F
Closest named color: Deep Sea Blue (#015482). oklch(42% 0.08 227.5), rgb(3, 85, 111).
Aa
White text reads best on this color (8.29:1).
About this color
#03556F is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.080 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.033 away. White text reads best on it, at 8.29:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #03556F |
| RGB | rgb(3, 85, 111) |
| HSL | hsl(194, 95%, 22%) |
| OKLCH | oklch(42% 0.08 227.5) |
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 #03556F | 8.29:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #03556F | 2.53:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #03556F text on white | 8.29:1 | AAA | Lc 88.1 | Fine for body text |
| #03556F text on black | 2.53:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE7
oklch(88.5% 0.026 227.9)
-
Step 300
300
#A2C7D9
oklch(80.9% 0.047 229)
-
Step 400
400
#6CAAC5
oklch(70.6% 0.075 227.5)
-
Step 500
500
#3F95B7
oklch(63.2% 0.096 227.4)
-
Step 600
600
#107FA3
oklch(55.7% 0.104 227.3)
-
Step 700
700
#006B8B
oklch(49.2% 0.095 227.3)
-
Step 800
800 (this color)
#03556F
oklch(42% 0.08 227.5)
-
Step 900
900
#14485B
oklch(37.7% 0.062 226.7)
-
Step 950
950
#0E2A36
oklch(27% 0.04 229.1)
#03556F 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) | #475370 | 0.058 |
| Deuteranopia (no green cones) | #3A4A6F | 0.050 |
| Tritanopia (no blue cones) | #005C5E | 0.042 |
| Achromatopsia (no color) | #4E4E4E | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03556F
#03556F
oklch(42% 0.08 227.5)
- #703E24
#703E24
oklch(42% 0.08 47.1)
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 #03556F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.033
- Petrol #005F6A ΔE 0.036
- Deep Teal #00555A ΔE 0.037
- Light Navy #155084 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.055
- YInMn Blue #415A77 ΔE 0.055
Use #03556F 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.