#1F5159
Closest named color: Deep Teal (#00555A). oklch(40.5% 0.055 209.5), rgb(31, 81, 89).
Aa
White text reads best on this color (8.82:1).
About this color
#1F5159 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.055 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.018 away. White text reads best on it, at 8.82:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.37:1 |
| White text | 8.82:1 |
Values
| HEX | #1F5159 |
| RGB | rgb(31, 81, 89) |
| HSL | hsl(188, 48%, 24%) |
| OKLCH | oklch(40.5% 0.055 209.5) |
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 #1F5159 | 8.82:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #1F5159 | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #1F5159 text on white | 8.82:1 | AAA | Lc 90.0 | Fine for body text |
| #1F5159 text on black | 2.37:1 | Fails | Lc -12.3 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDDDF
oklch(88.6% 0.017 205.8)
-
Step 300
300
#AAC7CC
oklch(81% 0.032 209.2)
-
Step 400
400
#7BAAB2
oklch(70.7% 0.051 209.1)
-
Step 500
500
#57959F
oklch(63.2% 0.066 208.8)
-
Step 600
600
#3A7F8A
oklch(55.7% 0.071 209.2)
-
Step 700
700
#2C6B75
oklch(49.1% 0.066 209.4)
-
Step 800
800 (this color)
#1F5159
oklch(40.5% 0.055 209.5)
-
Step 900
900
#24484E
oklch(37.7% 0.043 209.4)
-
Step 950
950
#162A2E
oklch(27% 0.027 211.7)
#1F5159 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) | #4A4E5A | 0.052 |
| Deuteranopia (no green cones) | #414859 | 0.046 |
| Tritanopia (no blue cones) | #005553 | 0.024 |
| Achromatopsia (no color) | #4A4A4A | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F5159
#1F5159
oklch(40.5% 0.055 209.5)
- #633E38
#633E38
oklch(40.6% 0.053 29.7)
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 #1F5159, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.018
- Dark Slate Gray #2F4F4F ΔE 0.020
- Dark Teal #014D4E ΔE 0.029
- Charcoal #264653 ΔE 0.034
- Dark Blue Green #005249 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.037
- Petrol #005F6A ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.058
Use #1F5159 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.