#3F7E91
Closest named color: Cerulean (#457B9D). oklch(55.9% 0.071 220), rgb(63, 126, 145).
Aa
Black text reads best on this color (4.60:1).
About this color
#3F7E91 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.071 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.024 away. Black text reads best on it, at 4.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.60:1 |
| White text | 4.56:1 |
Values
| HEX | #3F7E91 |
| RGB | rgb(63, 126, 145) |
| HSL | hsl(194, 39%, 41%) |
| OKLCH | oklch(55.9% 0.071 220) |
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 #3F7E91 | 4.56:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #3F7E91 | 4.60:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #3F7E91 text on white | 4.56:1 | AA | Lc 71.5 | Content text, not long reading |
| #3F7E91 text on black | 4.60:1 | AA | Lc -30.2 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CDDCE1
oklch(88.5% 0.018 219.7)
-
Step 300
300
#ABC6CF
oklch(80.9% 0.032 219.9)
-
Step 400
400
#7DA9B7
oklch(70.8% 0.051 219.5)
-
Step 500
500
#5A93A5
oklch(63.1% 0.066 220.1)
-
Step 600
600 (this color)
#3F7E91
oklch(55.9% 0.071 220)
-
Step 700
700
#30697B
oklch(49% 0.066 221.4)
-
Step 800
800
#295664
oklch(42.7% 0.054 220.7)
-
Step 900
900
#264751
oklch(37.7% 0.042 219.5)
-
Step 950
950
#172A30
oklch(27.1% 0.027 220)
#3F7E91 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) | #727B92 | 0.059 |
| Deuteranopia (no green cones) | #667291 | 0.053 |
| Tritanopia (no blue cones) | #008484 | 0.043 |
| Achromatopsia (no color) | #767676 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7E91
#3F7E91
oklch(55.9% 0.071 220)
- #986654
#986654
oklch(55.9% 0.071 40.6)
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 #3F7E91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.024
- Stormy Blue #507B9C ΔE 0.028
- Ocean #017B92 ΔE 0.033
- Metallic Blue #4F738E ΔE 0.033
- Teal Blue #01889F ΔE 0.036
- Dull Blue #49759C ΔE 0.037
- Grey Blue #647D8E ΔE 0.040
- Teal #008080 ΔE 0.045
Use #3F7E91 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.