#004997
Closest named color: Cobalt (#1E488F). oklch(41.6% 0.143 256.1), rgb(0, 73, 151).
Aa
White text reads best on this color (8.75:1).
About this color
#004997 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.143 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.019 away. White text reads best on it, at 8.75:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #004997 |
| RGB | rgb(0, 73, 151) |
| HSL | hsl(211, 100%, 30%) |
| OKLCH | oklch(41.6% 0.143 256.1) |
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 #004997 | 8.75:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #004997 | 2.39:1 | Fails | Lc 14.7 | Not readable |
| #004997 text on white | 8.75:1 | AAA | Lc 89.2 | Fine for body text |
| #004997 text on black | 2.39:1 | Fails | Lc -13.0 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9EC3F6
oklch(80.9% 0.083 256.5)
-
Step 400
400
#67A2F2
oklch(70.6% 0.133 256.4)
-
Step 500
500
#3989EE
oklch(63.2% 0.171 255.9)
-
Step 600
600
#0C70DC
oklch(55.7% 0.185 256)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800 (this color)
#004997
oklch(41.6% 0.143 256.1)
-
Step 900
900
#11407B
oklch(37.6% 0.112 256.4)
-
Step 950
950
#0C2648
oklch(26.9% 0.071 256.4)
#004997 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) | #13519A | 0.026 |
| Deuteranopia (no green cones) | #004595 | 0.011 |
| Tritanopia (no blue cones) | #005C69 | 0.106 |
| Achromatopsia (no color) | #4B4B4B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004997
#004997
oklch(41.6% 0.143 256.1)
- #674400
#674400
oklch(41.6% 0.088 75.6)
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 #004997, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.019
- Light Navy #155084 ΔE 0.041
- Dusk Blue #26538D ΔE 0.043
- Twilight Blue #0A437A ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.051
- Sapphire #2138AB ΔE 0.054
- Blueberry #464196 ΔE 0.063
- Light Navy Blue #2E5A88 ΔE 0.068
Use #004997 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.