#5BBB99
Closest named color: Greeny Blue (#42B395). oklch(72.4% 0.105 167.8), rgb(91, 187, 153).
Aa
Black text reads best on this color (9.01:1).
About this color
#5BBB99 is a medium-light, moderately saturated green. In OKLCH its lightness is 72%, its chroma 0.105 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.031 away. Black text reads best on it, at 9.01:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 9.01:1 |
| White text | 2.32:1 |
Values
| HEX | #5BBB99 |
| RGB | rgb(91, 187, 153) |
| HSL | hsl(159, 41%, 55%) |
| OKLCH | oklch(72.4% 0.105 167.8) |
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 #5BBB99 | 2.32:1 | Fails | Lc -50.6 | Large or bold text, headings |
| Black text on #5BBB99 | 9.01:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #5BBB99 text on white | 2.32:1 | Fails | Lc 45.7 | Large or bold text, headings |
| #5BBB99 text on black | 9.01:1 | AAA | Lc -56.3 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F7F4
oklch(97% 0.008 168.8)
-
Step 100
100
#DFEEE7
oklch(93.6% 0.018 166.4)
-
Step 200
200
#C3E1D4
oklch(88.4% 0.036 167.5)
-
Step 300
300
#97CFB8
oklch(80.9% 0.067 167.4)
-
Step 400
400 (this color)
#5BBB99
oklch(72.4% 0.105 167.8)
-
Step 500
500
#00A27A
oklch(63.2% 0.129 167.5)
-
Step 600
600
#008866
oklch(55.6% 0.113 167.6)
-
Step 700
700
#007255
oklch(49% 0.1 167.6)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E39
oklch(37.6% 0.077 167.4)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#5BBB99 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) | #B7B097 | 0.106 |
| Deuteranopia (no green cones) | #A8A59B | 0.102 |
| Tritanopia (no blue cones) | #36BCB1 | 0.037 |
| Achromatopsia (no color) | #AAAAAA | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBB99
#5BBB99
oklch(72.4% 0.105 167.8)
- #D78AB2
#D78AB2
oklch(72.4% 0.106 347.6)
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 #5BBB99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.031
- Topaz #13BBAF ΔE 0.042
- Green Blue #01C08D ΔE 0.045
- Greenblue #23C48B ΔE 0.048
- Tea #65AB7C ΔE 0.049
- Faded Green #7BB274 ΔE 0.050
- Dark Sea Green #8FBC8F ΔE 0.052
- Light Sea Green #20B2AA ΔE 0.053
Use #5BBB99 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.