#004E73
Closest named color: Deep Sea Blue (#015482). oklch(40.3% 0.09 238.4), rgb(0, 78, 115).
Aa
White text reads best on this color (8.98:1).
About this color
#004E73 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.090 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.029 away. White text reads best on it, at 8.98:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #004E73 |
| RGB | rgb(0, 78, 115) |
| HSL | hsl(199, 100%, 23%) |
| OKLCH | oklch(40.3% 0.09 238.4) |
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 #004E73 | 8.98:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #004E73 | 2.33:1 | Fails | Lc 13.9 | Not readable |
| #004E73 text on white | 8.98:1 | AAA | Lc 90.1 | Preferred for body text |
| #004E73 text on black | 2.33:1 | Fails | Lc -12.2 | 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
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6DF
oklch(80.9% 0.052 238.6)
-
Step 400
400
#6DA8CF
oklch(70.6% 0.084 238.5)
-
Step 500
500
#4192C3
oklch(63.1% 0.108 238.4)
-
Step 600
600
#187BAF
oklch(55.5% 0.117 238.6)
-
Step 700
700
#036897
oklch(49.2% 0.109 238.4)
-
Step 800
800 (this color)
#004E73
oklch(40.3% 0.09 238.4)
-
Step 900
900
#164662
oklch(37.6% 0.07 238.5)
-
Step 950
950
#0F293A
oklch(26.9% 0.045 240)
#004E73 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) | #3C4E75 | 0.048 |
| Deuteranopia (no green cones) | #2D4572 | 0.037 |
| Tritanopia (no blue cones) | #00575B | 0.057 |
| Achromatopsia (no color) | #494949 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004E73
#004E73
oklch(40.3% 0.09 238.4)
- #6B3A0A
#6B3A0A
oklch(40.2% 0.09 58.3)
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 #004E73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.029
- Light Navy #155084 ΔE 0.031
- Twilight Blue #0A437A ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.045
- Dusk Blue #26538D ΔE 0.052
- Deep Teal #00555A ΔE 0.054
- Charcoal #264653 ΔE 0.055
- Cobalt #1E488F ΔE 0.056
Use #004E73 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.