#1F554B
Closest named color: Dark Blue Green (#005249). oklch(41% 0.059 179), rgb(31, 85, 75).
Aa
White text reads best on this color (8.53:1).
About this color
#1F554B is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.059 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.020 away. White text reads best on it, at 8.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.45:1 |
| White text | 8.53:1 |
Values
| HEX | #1F554B |
| RGB | rgb(31, 85, 75) |
| HSL | hsl(169, 47%, 23%) |
| OKLCH | oklch(41% 0.059 179) |
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 #1F554B | 8.53:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #1F554B | 2.45:1 | Fails | Lc 14.8 | Not readable |
| #1F554B text on white | 8.53:1 | AAA | Lc 89.2 | Fine for body text |
| #1F554B text on black | 2.45:1 | Fails | Lc -13.1 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDED9
oklch(88.6% 0.02 177.4)
-
Step 300
300
#AAC8C1
oklch(80.9% 0.034 179.7)
-
Step 400
400
#7BACA1
oklch(70.6% 0.055 179.2)
-
Step 500
500
#56988A
oklch(63.1% 0.071 178.6)
-
Step 600
600
#388274
oklch(55.6% 0.077 179)
-
Step 700
700
#296E61
oklch(49.1% 0.072 178.6)
-
Step 800
800 (this color)
#1F554B
oklch(41% 0.059 179)
-
Step 900
900
#234A42
oklch(37.8% 0.047 178.6)
-
Step 950
950
#152B27
oklch(26.9% 0.029 181)
#1F554B 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) | #51504B | 0.062 |
| Deuteranopia (no green cones) | #494A4C | 0.059 |
| Tritanopia (no blue cones) | #005652 | 0.016 |
| Achromatopsia (no color) | #4C4C4C | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F554B
#1F554B
oklch(41% 0.059 179)
- #653C4A
#653C4A
oklch(41% 0.061 358.1)
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 #1F554B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.020
- Dark Slate Gray #2F4F4F ΔE 0.027
- Deep Teal #00555A ΔE 0.027
- Dark Teal #014D4E ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.045
- Petrol #005F6A ΔE 0.051
- Pine #2B5D34 ΔE 0.051
- Spruce #0A5F38 ΔE 0.053
Use #1F554B 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.