#1F449D
Closest named color: Cobalt (#1E488F). oklch(41.7% 0.151 263.9), rgb(31, 68, 157).
Aa
White text reads best on this color (8.85:1).
About this color
#1F449D is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.151 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 8.85:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #1F449D |
| RGB | rgb(31, 68, 157) |
| HSL | hsl(222, 67%, 37%) |
| OKLCH | oklch(41.7% 0.151 263.9) |
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 #1F449D | 8.85:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #1F449D | 2.37:1 | Fails | Lc 14.2 | Not readable |
| #1F449D text on white | 8.85:1 | AAA | Lc 89.7 | Fine for body text |
| #1F449D text on black | 2.37:1 | Fails | Lc -12.5 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9DAFB
oklch(88.6% 0.049 263.7)
-
Step 300
300
#A4C1FB
oklch(81% 0.088 263.9)
-
Step 400
400
#739EF9
oklch(70.8% 0.142 264)
-
Step 500
500
#4F82F5
oklch(63% 0.181 264)
-
Step 600
600
#3468E4
oklch(55.5% 0.197 263.9)
-
Step 700
700
#2856C6
oklch(49.1% 0.182 264)
-
Step 800
800 (this color)
#1F449D
oklch(41.7% 0.151 263.9)
-
Step 900
900
#203D7F
oklch(37.7% 0.117 263.8)
-
Step 950
950
#13244A
oklch(26.9% 0.074 264)
#1F449D 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) | #0050A0 | 0.032 |
| Deuteranopia (no green cones) | #00459B | 0.017 |
| Tritanopia (no blue cones) | #005A69 | 0.119 |
| Achromatopsia (no color) | #4A4A4A | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F449D
#1F449D
oklch(41.7% 0.151 263.9)
- #624700
#624700
oklch(41.6% 0.085 83.7)
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 #1F449D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Sapphire #2138AB ΔE 0.036
- Blueberry #464196 ΔE 0.049
- Dusk Blue #26538D ΔE 0.053
- Light Navy #155084 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.059
- Twilight Blue #0A437A ΔE 0.061
- Blue Blue #2242C7 ΔE 0.068
Use #1F449D 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.