#004F71
Closest named color: Deep Sea Blue (#015482). oklch(40.4% 0.087 235.9), rgb(0, 79, 113).
Aa
White text reads best on this color (8.91:1).
About this color
#004F71 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.087 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 8.91:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #004F71 |
| RGB | rgb(0, 79, 113) |
| HSL | hsl(198, 100%, 22%) |
| OKLCH | oklch(40.4% 0.087 235.9) |
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 #004F71 | 8.91:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #004F71 | 2.35:1 | Fails | Lc 14.1 | Not readable |
| #004F71 text on white | 8.91:1 | AAA | Lc 89.9 | Fine for body text |
| #004F71 text on black | 2.35:1 | 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
#C8DDEA
oklch(88.6% 0.029 234.9)
-
Step 300
300
#A2C6DD
oklch(80.8% 0.05 236.3)
-
Step 400
400
#6DA9CD
oklch(70.7% 0.082 235.9)
-
Step 500
500
#4193C0
oklch(63.2% 0.104 235.8)
-
Step 600
600
#177CAC
oklch(55.5% 0.113 236.1)
-
Step 700
700
#026994
oklch(49.2% 0.105 235.7)
-
Step 800
800 (this color)
#004F71
oklch(40.4% 0.087 235.9)
-
Step 900
900
#164760
oklch(37.8% 0.067 234.9)
-
Step 950
950
#0F2A38
oklch(27.1% 0.042 233.9)
#004F71 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 | 0.050 |
| Deuteranopia (no green cones) | #304670 | 0.040 |
| Tritanopia (no blue cones) | #00585B | 0.054 |
| Achromatopsia (no color) | #4A4A4A | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004F71
#004F71
oklch(40.4% 0.087 235.9)
- #6C3A12
#6C3A12
oklch(40.4% 0.087 54.9)
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 #004F71, 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 0.044
- Deep Teal #00555A ΔE 0.049
- Charcoal #264653 ΔE 0.053
- Dusk Blue #26538D ΔE 0.054
- Petrol #005F6A ΔE 0.056
Use #004F71 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.