#51998B
Closest named color: Grey Teal (#5E9B8A). oklch(63.2% 0.076 179.6), rgb(81, 153, 139).
Aa
Black text reads best on this color (6.27:1).
About this color
#51998B is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.076 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Teal (#5E9B8A), ΔE 0.015 away. Black text reads best on it, at 6.27:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Grey Teal (#5E9B8A) |
| Black text | 6.27:1 |
| White text | 3.34:1 |
Values
| HEX | #51998B |
| RGB | rgb(81, 153, 139) |
| HSL | hsl(168, 31%, 46%) |
| OKLCH | oklch(63.2% 0.076 179.6) |
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 #51998B | 3.34:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #51998B | 6.27:1 | AA | Lc 43.3 | Non-text elements, placeholder text |
| #51998B text on white | 3.34:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #51998B text on black | 6.27:1 | AA | Lc -41.0 | 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 500.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A8C9C1
oklch(80.9% 0.037 179)
-
Step 400
400
#77ADA2
oklch(70.7% 0.059 180.4)
-
Step 500
500 (this color)
#51998B
oklch(63.2% 0.076 179.6)
-
Step 600
600
#308375
oklch(55.6% 0.083 180)
-
Step 700
700
#226F62
oklch(49.2% 0.077 179.5)
-
Step 800
800
#1F5A50
oklch(42.6% 0.063 180)
-
Step 900
900
#204A42
oklch(37.6% 0.049 179.4)
-
Step 950
950
#142C27
oklch(27.2% 0.032 178.7)
#51998B 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) | #94928A | 0.081 |
| Deuteranopia (no green cones) | #88898C | 0.076 |
| Tritanopia (no blue cones) | #339B95 | 0.023 |
| Achromatopsia (no color) | #8C8C8C | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51998B
#51998B
oklch(63.2% 0.076 179.6)
- #B07688
#B07688
oklch(63.1% 0.076 359.3)
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 #51998B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Teal #5E9B8A ΔE 0.015
- Sea #3C9992 ΔE 0.018
- Dull Teal #5F9E8F ΔE 0.022
- Persian Green #2A9D8F ΔE 0.026
- Dusty Teal #4C9085 ΔE 0.027
- Blue Green #0F9B8E ΔE 0.034
- Cadet Blue #5F9EA0 ΔE 0.036
- Ocean Green #3D9973 ΔE 0.042
Use #51998B 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.