#1F4756
Closest named color: Charcoal (#264653). oklch(37.6% 0.052 225.3), rgb(31, 71, 86).
Aa
White text reads best on this color (10.02:1).
About this color
#1F4756 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.052 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.008 away. White text reads best on it, at 10.02:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.09:1 |
| White text | 10.02:1 |
Values
| HEX | #1F4756 |
| RGB | rgb(31, 71, 86) |
| HSL | hsl(196, 47%, 23%) |
| OKLCH | oklch(37.6% 0.052 225.3) |
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 #1F4756 | 10.02:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #1F4756 | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #1F4756 text on white | 10.02:1 | AAA | Lc 93.1 | Preferred for body text |
| #1F4756 text on black | 2.09:1 | Fails | Lc -9.4 | 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
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D4
oklch(80.8% 0.039 226.9)
-
Step 400
400
#76A9BE
oklch(70.6% 0.062 225.6)
-
Step 500
500
#5094AE
oklch(63.2% 0.079 225.1)
-
Step 600
600
#307E99
oklch(55.7% 0.086 224.6)
-
Step 700
700
#216A83
oklch(49.1% 0.08 225.1)
-
Step 800
800
#1E566A
oklch(42.6% 0.066 225.4)
-
Step 900
900 (this color)
#1F4756
oklch(37.6% 0.052 225.3)
-
Step 950
950
#132A33
oklch(27.1% 0.033 225.6)
#1F4756 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) | #3F4557 | 0.040 |
| Deuteranopia (no green cones) | #374056 | 0.035 |
| Tritanopia (no blue cones) | #004B4C | 0.031 |
| Achromatopsia (no color) | #424242 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4756
#1F4756
oklch(37.6% 0.052 225.3)
- #58382A
#58382A
oklch(37.5% 0.051 44.4)
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 #1F4756, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.008
- Dark Grey Blue #29465B ΔE 0.015
- Dark Teal #014D4E ΔE 0.032
- Dark Slate Gray #2F4F4F ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.039
- Deep Teal #00555A ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.045
- Midnight Green #073B4C ΔE 0.047
Use #1F4756 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.