#00448A
Closest named color: Cobalt (#1E488F). oklch(39.4% 0.131 255.3), rgb(0, 68, 138).
Aa
White text reads best on this color (9.57:1).
About this color
#00448A is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.131 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 9.57:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #00448A |
| RGB | rgb(0, 68, 138) |
| HSL | hsl(210, 100%, 27%) |
| OKLCH | oklch(39.4% 0.131 255.3) |
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 #00448A | 9.57:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #00448A | 2.19:1 | Fails | Lc 12.5 | Not readable |
| #00448A text on white | 9.57:1 | AAA | Lc 91.5 | Preferred for body text |
| #00448A text on black | 2.19:1 | Fails | Lc -10.9 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C2DCFE
oklch(88.6% 0.055 255.2)
-
Step 300
300
#96C4FF
oklch(81% 0.097 254.9)
-
Step 400
400
#59A2FF
oklch(70.7% 0.155 255.4)
-
Step 500
500
#1687FF
oklch(63.2% 0.201 255.3)
-
Step 600
600
#0070DC
oklch(55.6% 0.186 255.4)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900 (this color)
#00448A
oklch(39.4% 0.131 255.3)
-
Step 950
950
#04264E
oklch(27.1% 0.083 255.3)
#00448A 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) | #174B8D | 0.025 |
| Deuteranopia (no green cones) | #004089 | 0.011 |
| Tritanopia (no blue cones) | #005560 | 0.098 |
| Achromatopsia (no color) | #454545 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00448A
#00448A
oklch(39.4% 0.131 255.3)
- #5F3E00
#5F3E00
oklch(39.2% 0.083 75.1)
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 #00448A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Twilight Blue #0A437A ΔE 0.027
- Light Navy #155084 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
- Marine Blue #01386A ΔE 0.062
- Sapphire #2138AB ΔE 0.064
- Blueberry #464196 ΔE 0.070
Use #00448A 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.