#004B7A
Closest named color: Twilight Blue (#0A437A). oklch(39.9% 0.101 245.4), rgb(0, 75, 122).
Aa
White text reads best on this color (9.18:1).
About this color
#004B7A is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.101 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.024 away. White text reads best on it, at 9.18:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.28:1 |
| White text | 9.18:1 |
Values
| HEX | #004B7A |
| RGB | rgb(0, 75, 122) |
| HSL | hsl(203, 100%, 24%) |
| OKLCH | oklch(39.9% 0.101 245.4) |
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 #004B7A | 9.18:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #004B7A | 2.28:1 | Fails | Lc 13.4 | Not readable |
| #004B7A text on white | 9.18:1 | AAA | Lc 90.6 | Preferred for body text |
| #004B7A text on black | 2.28:1 | Fails | Lc -11.7 | 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
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C3DDF4
oklch(88.6% 0.042 245)
-
Step 300
300
#98C6EF
oklch(80.8% 0.076 245.8)
-
Step 400
400
#59A8E7
oklch(70.8% 0.121 244.8)
-
Step 500
500
#1290E0
oklch(63.1% 0.155 245.1)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900 (this color)
#004B7A
oklch(39.9% 0.101 245.4)
-
Step 950
950
#032943
oklch(27.1% 0.063 244.1)
#004B7A 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) | #344D7C | 0.040 |
| Deuteranopia (no green cones) | #224379 | 0.028 |
| Tritanopia (no blue cones) | #00575C | 0.072 |
| Achromatopsia (no color) | #484848 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004B7A
#004B7A
oklch(39.9% 0.101 245.4)
- #673C00
#673C00
oklch(39.9% 0.089 66.1)
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 #004B7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.024
- Light Navy #155084 ΔE 0.025
- Deep Sea Blue #015482 ΔE 0.029
- Cobalt #1E488F ΔE 0.041
- Dusk Blue #26538D ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.061
- Marine Blue #01386A ΔE 0.061
Use #004B7A 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.