#1F4E5B
Closest named color: Charcoal (#264653). oklch(39.7% 0.055 218.9), rgb(31, 78, 91).
Aa
White text reads best on this color (9.13:1).
About this color
#1F4E5B is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.055 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.026 away. White text reads best on it, at 9.13:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #1F4E5B |
| RGB | rgb(31, 78, 91) |
| HSL | hsl(193, 49%, 24%) |
| OKLCH | oklch(39.7% 0.055 218.9) |
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 #1F4E5B | 9.13:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #1F4E5B | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #1F4E5B text on white | 9.13:1 | AAA | Lc 90.8 | Preferred for body text |
| #1F4E5B text on black | 2.29:1 | Fails | Lc -11.5 | 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 900.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#C9DDE3
oklch(88.4% 0.023 217.7)
-
Step 300
300
#A4C8D3
oklch(81% 0.041 218.3)
-
Step 400
400
#70ABBD
oklch(70.7% 0.067 219.1)
-
Step 500
500
#4696AC
oklch(63.2% 0.084 218.5)
-
Step 600
600
#1F8097
oklch(55.7% 0.091 218)
-
Step 700
700
#0E6C81
oklch(49.2% 0.085 218.3)
-
Step 800
800
#125869
oklch(42.7% 0.071 218.6)
-
Step 900
900 (this color)
#1F4E5B
oklch(39.7% 0.055 218.9)
-
Step 950
950
#102A32
oklch(26.8% 0.035 220.6)
#1F4E5B 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) | #464C5C | 0.047 |
| Deuteranopia (no green cones) | #3D455B | 0.043 |
| Tritanopia (no blue cones) | #005252 | 0.029 |
| Achromatopsia (no color) | #484848 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4E5B
#1F4E5B
oklch(39.7% 0.055 218.9)
- #613C31
#613C31
oklch(39.7% 0.056 37.3)
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 #1F4E5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.026
- Dark Slate Gray #2F4F4F ΔE 0.026
- Deep Teal #00555A ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.027
- Dark Teal #014D4E ΔE 0.030
- Dark Blue Green #005249 ΔE 0.042
- Petrol #005F6A ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.055
Use #1F4E5B 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.