#004F79
Closest named color: Deep Sea Blue (#015482). oklch(40.9% 0.096 241.5), rgb(0, 79, 121).
Aa
White text reads best on this color (8.77:1).
About this color
#004F79 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.096 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.020 away. White text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #004F79 |
| RGB | rgb(0, 79, 121) |
| HSL | hsl(201, 100%, 24%) |
| OKLCH | oklch(40.9% 0.096 241.5) |
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 #004F79 | 8.77:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #004F79 | 2.39:1 | Fails | Lc 14.5 | Not readable |
| #004F79 text on white | 8.77:1 | AAA | Lc 89.5 | Fine for body text |
| #004F79 text on black | 2.39:1 | Fails | Lc -12.8 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E2
oklch(80.9% 0.056 241)
-
Step 400
400
#6CA8D4
oklch(70.8% 0.09 241.4)
-
Step 500
500
#3F91C8
oklch(63% 0.115 241.3)
-
Step 600
600
#137AB5
oklch(55.5% 0.125 241.6)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800 (this color)
#004F79
oklch(40.9% 0.096 241.5)
-
Step 900
900
#144666
oklch(37.8% 0.075 241.4)
-
Step 950
950
#0E293B
oklch(27% 0.047 240.8)
#004F79 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) | #3B507B | 0.046 |
| Deuteranopia (no green cones) | #2B4678 | 0.035 |
| Tritanopia (no blue cones) | #00595E | 0.063 |
| Achromatopsia (no color) | #4B4B4B | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004F79
#004F79
oklch(40.9% 0.096 241.5)
- #6E3C00
#6E3C00
oklch(41% 0.095 61.4)
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 #004F79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.020
- Light Navy #155084 ΔE 0.021
- Twilight Blue #0A437A ΔE 0.037
- Dusk Blue #26538D ΔE 0.043
- Cobalt #1E488F ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.054
- Deep Teal #00555A ΔE 0.062
Use #004F79 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.