#224D8B
Closest named color: Cobalt (#1E488F). oklch(42.4% 0.114 257.9), rgb(34, 77, 139).
Aa
White text reads best on this color (8.39:1).
About this color
#224D8B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.114 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.017 away. White text reads best on it, at 8.39:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.39:1 |
Values
| HEX | #224D8B |
| RGB | rgb(34, 77, 139) |
| HSL | hsl(215, 61%, 34%) |
| OKLCH | oklch(42.4% 0.114 257.9) |
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 #224D8B | 8.39:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #224D8B | 2.50:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #224D8B text on white | 8.39:1 | AAA | Lc 88.6 | Fine for body text |
| #224D8B text on black | 2.50:1 | Fails | Lc -13.6 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF2
oklch(88.4% 0.037 258.4)
-
Step 300
300
#A6C3EC
oklch(81% 0.066 257)
-
Step 400
400
#76A2E2
oklch(70.6% 0.106 257.7)
-
Step 500
500
#5289DA
oklch(63% 0.136 258)
-
Step 600
600
#3672C8
oklch(55.7% 0.147 257.8)
-
Step 700
700
#285FAD
oklch(49.1% 0.137 257.8)
-
Step 800
800 (this color)
#224D8B
oklch(42.4% 0.114 257.9)
-
Step 900
900
#214170
oklch(37.6% 0.089 258)
-
Step 950
950
#142641
oklch(26.8% 0.056 258.3)
#224D8B 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) | #2E538D | 0.023 |
| Deuteranopia (no green cones) | #1B498A | 0.014 |
| Tritanopia (no blue cones) | #005C65 | 0.090 |
| Achromatopsia (no color) | #4D4D4D | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #224D8B
#224D8B
oklch(42.4% 0.114 257.9)
- #684700
#684700
oklch(42.4% 0.088 78.4)
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 #224D8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.017
- Light Navy #155084 ΔE 0.018
- Dusk Blue #26538D ΔE 0.018
- Deep Sea Blue #015482 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.052
- Blueberry #464196 ΔE 0.056
Use #224D8B 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.